第二恒磨牙龋与第一恒磨牙龋构成比随年龄增长而上升。
The composition ratio of first and second permanent molars caries increased with the age increasing.
结果保存修复的成功率下颌第一恒磨牙为94％，第二恒磨牙为67％。
Results The successful rate of conservative prosthetics was 94% in the first mandibular molars, while 67% in the second molars.
目的了解下颌第二恒磨牙不同载荷下近中移动时的位移及应力分布情况。
Objective To investigate the displacements and the stress distributions of a mandibular second molar.
因此，实现龋病预防三早，重视第二恒磨牙开展窝沟封闭具有实际意义。
Therefore pit and fissure sealing on second molar can be used on the prevention of permanent dental caries.
这款限量版奢侈手表是恒宝兄弟钟表行的产品，一系列象征着瑞士手表品牌的特别手表，最具前瞻性的思考，最独一无二的做工。
This limited edition luxury timepiece is part of the Hublot Confrerie line, a series of special watches that represent the Swiss brand's most forward thinking and exclusive work.
扫描二维码注册钉钉企业用户，并开通安恒密盾，根据向导申请企业认证。
Scan two-dimensional code nail registered enterprise users, and the opening of an Hengmi shield, according to the guide enterprises to apply for certification.
四分学识智，三心细耐恒，二成应试法，一片平常心。
Four points of knowledge and wisdom, the three talk Loparex, two test method, a common heart.
它的二阶导数就是这个恒加速度。
运用上述公式和特殊限制条件，同样得出二组分恒沸物系只有一个自由度的结论。
By application of the formula indicated and special limiting condition, the conclusion of only one degree of freedom with two-component azeotropic system can be obtained.
目的：建立在混合牙列早期预测恒侧切牙牙冠及恒侧切牙至第二前磨牙冠宽和的回归方程。
Objective :In this study , regression equations (prediction equations) were established for the purpose of accurately predicting the mesiodistal widths of the crowns of unerupted lateral incisors .
非设计工况下流道的水力损失恒大于相同流量时设计工况下的水力损失，左侧的水力损失大于右侧的水力损失，且不符合二次抛物线变化规律。
The head loss of the left side is always greater than that of the right side, and the head loss curves don't comply with the second order parabolic law.
近日，广州恒大足球队，这支去年还在中国二级联赛里打拼的球队已经在中超联赛里至今不败了。
Nowadays, Guangzhou Hengda Soccer Team, which was an ordinary team fighting in the Second-level Competition last year haven't been beaten until now.
通过分析CDMA系统的特点，提出码滤波最小二乘恒模算法（CF-LSCMA），保证了恒模阵列能够应用于CDMA系统。
Through analyzing on the features of CDMA system, this paper advance the CF-LSCMA algorithm, which guarantees the constant modulus array could be applied in CDMA system.
另外，分析比较了一座直线多室箱梁桥在不同支承方式下恒活载效应、预应力效应、次反力和二次内力的异同。
Additionally, the difference of total effect and secondary forces due to prestressing tendons under two kinds of boundary conditions is given.
发现恒重后的双锍盐含有二个结晶水这一新现象，并确认最终产物为聚对苯乙炔。
Based on our determined results, we had found a new phenomenon that the disulphonium salt contains two crystal-waters and the last product is PPV.
二是以江铃陆风越野车、百路佳客车、格特拉克变速箱、马恒达拖拉机为代表的汽车制造产业；
Second, Automobile Making Industry headed by Landwind Co. producing off-road vehicle, Bai Lujia Bus, Getrag Gear and Mahindra Tractor.
通过软件控制，实现荧光灯预热启动、二级调光、恒功率控制、异常保护等功能。
The software can ensure lamp's reliable pre-heating ignition and constant-power operation, and realize two grade dimming control, abnormity protection.
利用恒电流试验测试了工业纯铁和35钢在海水和淡水中的牺牲阳极性能，利用电流阶跃阳极极化法测试了二者在海水和淡水中的极化性能。
In seawater and fresh water, the performance of ingot and 35 steel was measured by constant current experiment, and then their anodic polarization curves were drawn.
对焊接电流进行反馈恒流控制，自动补偿网压波动、二次回路感抗变化对焊接电流的影响；
The variety of current can be automatic compensated caused by undulating of voltage & secondary loop inductive reactance.
介绍了恒载和活载作用下的第一类稳定分析和第二类稳定分析，并进行了对比。
The stability analysis on the first type and the second type under the dead and the live load were introduced, meanwhile, the two types were compared.
于是二人同行，来到伯利恒。
结果表明乙二醇与醋酸钾的混合物是分离甲乙酮水二元恒沸物的理想萃取剂。
The separation of azeotrope of methyl ethyl ketone water has been investigated by extractive distillation using the mixture of ethylene glycol and potassium acetate as an extractant.
墩顶负弯矩主要来自于二期恒载和活载。当桥墩较高时，刚架桥可简化为连续梁桥计算。
When the pier is high, rigid-framed bridge can be simplified to continuous beam bridge.
搭建了水合物储气平台，采用稳态恒容降温进行了干水生成水合物储备丙烷、二氧化碳和甲烷的实验。
A gas storage apparatus by DW hydrate was set up for studying the storage of propane, carbon dioxide and methane by Steady-state constant-volume cooling method.
罗二4还是你藐视他丰富的恩慈、宽容与恒忍，不晓得神的恩慈是领你悔改？
Rom. 2:4 or do you despise the riches of His kindness and forbearance and long-suffering, not knowing that God's kindness is leading you to repentance?
目前，直流电机双闭环调速系统模型主要有理想模型、二阶线性模型以及在不考虑负载扰动或恒负载情况下的非线性模型等。
The DLM model mainly includes the ideal model, the second-order linear model and the non-linear model in constant load or without considering the load disturbance, and so on.
目前，直流电机双闭环调速系统模型主要有理想模型、二阶线性模型以及在不考虑负载扰动或恒负载情况下的非线性模型等。
The DLM model mainly includes the ideal model, the second-order linear model and the non-linear model in constant load or without considering the load disturbance, and so on.
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