外部索引键条件约束可让您在父、子资料表之间定义参考整合性。
A foreign key constraint allows you to define referential integrity between a parent and child table.
外部索引键条件约束可于父资料表和子资料表之间，实作参考完整性。
A foreign key constraint can implement referential integrity between parent and child tables.
您必须了解在产生的资料集程序码中，如何建立资料库中的外部索引键条件约束和串联行为。
It is important to understand how foreign-key constraints and cascading behavior in the database are created in the generated dataset code.
例如，建立新的客户和新的订单，然后尝试储存资料，会导致资料库中所定义的外部索引键条件约束发生冲突。
For example, creating a new customer and a new order and then trying to save the data can cause a conflict with the foreign-key constraints defined in the database.
用户可以按下ctrl键，然后单击浏览器的Refresh按钮，以阻止浏览器发送某个条件GET。
A user can hold down the Ctrl key and click the browser's Refresh action to prevent the browser from sending a conditional GET.
如果没有列能满足作为默认分区键的条件，则表在创建后就没有分区键，也就意味着这个表不能横跨一个以上的分区。
If no columns satisfy the requirement for a default partitioning key, the table is created without one, which means the table cannot span more than one partition.
在满足筛选器条件的每个行中，数据库服务器将对键应用哈希函数，并探测哈希表以查找匹配的键值。
For each row that satisfies the filter condition, the database server applies hash function to the key and proves the hash table to find a match.
没错，在理想化的条件下：面对有着许多可选项的对话框、菜单或启动页面时，触控快过方向键。
And yes, under ideal conditions, touch is faster than a d-pad when there are lots of options available in a dialog or menu or launcher page.
但日常使用中条件并不理想，传统方向键和物理键盘(无论是数字键盘还是全键盘)在大多数操作上更快捷且舒适。
But conditions aren't usually ideal when using a phone day to day and for many operations a traditional d-pad and physical keys (whether numeric or qwerty) are faster and more satisfying.
这将背离目前的高性能材料制造方式，目前的方式中，强化学键、昂贵的组成成分以及高耗能加工过程（在高温条件下）都是获得高性能材料所必需的。
This would be a departure from the current approach, where strong bonds, expensive constituents, and energy intensive processing (at high temperatures) are used to obtain high-performance materials.
getCatalogKey：用于将选择条件转换为一组唯一键。
GetCatalogKey : Used to convert the selection criteria to a set of unique keys.
Time维度表中满足过滤条件的 time_id连接键被散列以创建一个位向量，用于过滤以上跳跃式扫描的Orders 表行。
The time_id join keys that meet the filter requirements on the Time dimension table are hashed to create a bit vector that filters rows of the Orders table from the skip scan above.
Location维度表中满足过滤条件的 location_id连接键被下推至Orders 表的索引。
The location_id join keys that meet the filter requirements on the Location dimension table are pushed down to the index on the Orders table.
匹配键是用来识别设备的条件，当规则中所有对应设备的匹配键都被匹配以后，规则会被执行，并且触发动作。
Match keys are conditions used to identify the device which the rule is acting upon.
不借助元键的条件下，能完成的所有鼠标动作总结如下。
The complete set of mouse actions (that can be accomplished without using meta-keys) is summarized in the following list.
方法：采用高效液相色谱法对该药中的黄苓苷含量测定，色谱条件：选用十八烷基硅烷键合硅胶，以甲醇：水：冰醋酸（40：60：1）。
Method:Conducted baicalin assaying in this drug by HPLC. Chromatogram condition:Selecting octadecyl Chemically bonded phase silica gel, Methanol:water; glacial acetic acid (40:60:1)as mobile phase.
在特定相位条件下，由此计算出的键长和离解能与实际值相吻合。
Under the condition of phase difference given, the bond-length and dissociation energy calculated are quite consistent with the experimental values.
分子几何构型和振动基频对计算条件不太敏感，总能量和键能对计算结果较敏感。
The molecular geometry and the fundamental vibrational frequency are insensitive to the computation conditions, while the total energy and bond energy are pretty sensitive.
登录启动条件可以用于搜寻必要的登录索引键或值，如果找不到的话则显示错误讯息。
A registry launch condition can be used to search for a required registry key or value and display an error message if it is not found.
在键无规条件下，特别当反铁磁交换相互作用存在时，我们得到了一些有意义的结果。
Under the random bond condition, in particular, when there exists antiferromagnetic interaction, we obtain many meaningful results.
扩链剂的存在不是键合剂MAPO提高丁羟推进剂伸长率的必要条件。
The existence of any extender is not necessary for increasing the elongation of HTPB propellants by bonding agent MAPO.
因此，电子自旋配对不是共价键形成的原因，也不是先决条件，电子自旋配对只是双电子共价键的一个特点。
Therefore, the spin pairing is not cause of the formation of covalent bond, it is not also condition of first determining, the spin pairing is the only particularity of covalent bond of two electrons.
试验研究了不同超声功率条件下，键合时间对粗铝丝引线键合强度的影响规律。
The effect of bonding time on the bonding strength of thick aluminum wire wedge bonding was studied under different ultrasonic power conditions.
低温陶瓷木材是以植物剩余物和工业废磷渣为主要原料，采用化学键合陶瓷为粘结剂，在接近常温的条件下制备而成的具有陶瓷和木材双重性能的新型人造木材。
Ceramics timber of low temperature is a kind of material which uses plant remainder and the phosphorus dreg of industry abolishes as main raw materials, uses chemically bounded ceramic as its binder.
强大的应力使材料发生塑性变形，产生塑性流动，为界面生成键合强度提供良好的条件；
The powerful stress is big enough to cause plastic strain and plastic flow on the interface which can provide good conditions for bonding.
根据文献所提供的条件进行了实验，所得收率仅31-33％，分析原因为醚键断裂比较困难。
In accordance with the conditions provided by literature, the yield of the experiment done by us was only 31-33%. It's probably because of the difficulty of cleavage of ether bond.
从[资料表设计工具]，您也可以在方格区按一下滑鼠右键，存取可用以建立和修改资料表关联性、条件约束、索引和索引键的对话方块。
From table Designer, you can also right-click in the grid section to access dialog boxes through which you can create and modify relationships, constraints, indexes, and keys for the table.
您也可以从更新指令码置放主索引键、索引和唯一的条件约束。
You can also drop primary keys, indexes, and unique constraints from the update script.
外部索引键是强制使用参考完整性的条件约束。
A foreign key is a constraint that enforces referential integrity.
发现在加热条件下该类化合物中硅硅键不能被分子内过渡金属所活化。
The Si-Si bonds in the complexes were found to be stable towards the intramolecular transition metal atom.
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