Plastic bags cause the deaths of 100,000 marine animals each year because the animals mistake them for food. So if you must use them, always recycle them.
塑料袋每年会导致10万只海洋动物死亡，因为这些动物误以为它们是食物。所以如果你必须使用它们，一定要回收它们。
If you must use them, be aware that they will not always work.
如果必须使用它们，就要认识到它们不总是有效的。
If you MUST use the built-in flash, at least follow these tips.
如果你一定要用内置闪光灯的话，至少注意下列技巧。
If you must use more than one tool, keep them small and simple.
如果你必须用一件以上的工具，那就让它小一点，简单一点。
If you must use a night-light, pick a 'low blue' one (lowbluelights.com).
如果你必须要开着灯睡觉，那就换个发出淡蓝色灯光的夜灯吧。
If you must use a specific year, then this will make your life easier.
如果你一定要用一个明确的年份，那么这个结果会使你轻松很多。
Keep it Cool - If you must use a washing machine, keep it to 30 degrees.
低温水洗——如果不得不机洗的话，保持水温在30度左右。
If you must use two bags, there are two methods of packing with a partner.
假如一定要用两只箱子，有两种运输方式。
If you must use a PTFE-lined pan, keep your stove's burner on medium or lower.
非要使用PTFE(聚四氟乙烯)-内衬的平底锅时，将炉子燃烧器开到中等或更低程度。
If you must use such a file system, employing multiple volumes is a practical necessity.
如果必须使用这样的文件系统，可能有必要使用多个卷。
The recommended approach is to use static inner classes, if you must use an inner class at all.
推荐的做法是如果非要使用内部类的话，请使用静态内部类。
If you must use an attribute on the backing field of a property, just create a regular property.
如果您必须在属性的后备字段上使用特性，则应该只创建常规属性。
And if you must use a sweetener, to the best of our knowledge, xylitol and stevia are safe to use.
而如果你必须使用甜味剂，据我们所知，木糖醇、甜菊的安全使用。
If you must use multiple SPNs within a SPNEGO configuration see When are multiple SPNs recommended?
如果必须在SPNEGO中使用多个SPN(有关建议采用这种方式的唯一情况，请参见何时建议使用多个SPN ？)
If you must use the company's products, as long as a phone will be able to solve all the problems.
如您需使用本公司产品，只要一个电话就能解决所有问题。
If you must use a PTFE-lined pan, keep your stove's burner on media or lower. Also, never preheat an blank pan.
非要使用PTFE(聚四氟乙烯)内衬的平底锅时，应保证炉头处于中等或更低温度。另外，绝对不要预热空无一物的平底锅。
If you must use a PTFE-lined pan, keep your stove's burner on medium or lower. Also, never preheat an empty pan.
非要使用PTFE(聚四氟乙烯)内衬的平底锅时，应保证炉头处于中等或更低温度。另外，绝对不要预热空无一物的平底锅。
If you must use a long or more complex sentence, follow up with a short, punchy one to give your writing rhythm.
如果你真的得使用一个长而复杂的句子，那么请在接下来的一句使用短的句子，如此可创造出你自己的行文节奏。
If you must use a server, use a server whose operators give you a basis for trust beyond a mere commercial relationship.
如果你一定要用个伺服器，用一个除了商业关系之外你可以信任的伺服器。
If you must use an electronic tuner, use it only to help you divide the notes of the scale in the middle of your keyboard.
如果您必须使用一台电子调音器，记得它只能帮您调好键盘中间的音调。
If you must use fish on ice, pick one that is properly store (well-covered with ice, not sitting in a puddle of cold water).
如果你不得不用摆在冰上的鱼，也要选一条经过适当储藏的(用冰好好盖着的，没有泡在一滩冰冷的水里)。
If you must use this new function, I recommend that you include as many targets as possible for each interface you need to monitor.
如果必须使用这个新功能，建议为需要监视的每个接口指定尽可能多的目标。
If you must use CSS expressions, remember that they may be evaluated thousands of times and could affect the performance of your page.
如果使用必须CSS表达式请记住他们可能会评估的数以千计的时间，并可能会影响您的页面的性能。
If you must use more than ten slides to explain your business, you probably don't have a business. The ten topics that a venture capitalist CARES about are.
如果你必须要用超过10页的幻灯片来解释你的生意，你可能就没生意。
But if you must use the shell and you can't limit the data that comes in, you need to escape every potential meta-character before sending it in a command to the shell.
但是如果您必须使用shell并且不能限制到达的数据，那么就需要在将命令中的字符发送到shell中之前对可能存在的每个元字符进行转义。
If you must use descendant selectors, prefer child selectors, which at least only require evaluation of one additional node, not all the intermediate nodes up to an ancestor.
如果您必须使用后代选择器，尽量使用子代选择器，这最少只需评估一个额外的节点，而非中间直至祖先的所有节点。
Plastic bags cause the deaths of 100, 000 Marine animals each year when the animals mistake them for food, so if you must use them, always recycle them in the bin at your supermarket.
塑料袋每年会导致100,000海洋动物死亡，因为这些动物常常把塑料袋误当食物吞下去，因此，如果你一定要用塑料袋，一定要在超市垃圾箱回收塑料袋。
However, if you must use original values for optimistic concurrency checks, then the presentation tier is responsible for tracking those values and sending them back when it makes updates.
但是，如果必须使用原始值进行开放式并发检查，则表示层在其进行更新时负责跟踪这些值并将这些值发送回去。
However, if you must use original values for optimistic concurrency checks, then the presentation tier is responsible for tracking those values and sending them back when it makes updates.
但是，如果必须使用原始值进行开放式并发检查，则表示层在其进行更新时负责跟踪这些值并将这些值发送回去。
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