You could fall back on type checking inside the add method, but that is not elegant and inflexible.
您可以依赖add方法内部的类型检查，但这并不优雅而且不固定。
Before exploring outer space, people used to think that the earth was flat and that you could fall off the edge if you ever went that far.
在人类探索太空前，总把地球看作是平的，如果你走远了就会从边缘处落下去。
There's also a slim but real chance you could fall victim to a predator who's deliberately luring you into a vulnerable position, gathering information that can be used to control or victimize you.
还有一个很小却真实的可能性就是你可能成为一位蓄意引诱你进入一个脆弱位置的猎食者的受害人，来获得可能用于控制你或使受害人化的信息。
Well, you could understand why he might fall into the trap of thinking of himself as located in Chicago with all the visual inputs coming from Chicago.
那么，你们能理解为什么他可能由于所有的视觉输入都是来自芝加哥的信息而陷入误以为自己在芝加哥的陷阱中。
Or you could pay attention to the election that really matters, the one that will really affect your day to day life: the fall 2010 Internet-TV election.
也许你应该关注的是另一场真正重要的、将切实影响你日常生活的选举：2010秋天的互联网电视之战。
When you add a mapping to a WeakHashMap, remember that it is possible that the mapping could "fall out" later because the key is garbage collected.
在向WeakHashMap中添加映射时，请记住映射可能会在以后“脱离”，因为键被垃圾收集了。
Could you hire someone to come in and help him for a few hours each day, or could adjustments in the house help prevent another fall?
是否可以雇个人来每天来帮他几个小时，或者调整下房间布置来防止他再次跌倒？
Sleep experts say that if you feel groggy or tired during the day, feel the urge to nap, or if you fall asleep within five minutes of lying down, you could possibly be sleep-deprived.
睡眠专家们说如果你整天都感觉昏昏沉沉或疲惫不堪，很想要打个盹儿，或者是你躺下来五分钟内就去见了周公，你很可能已经处于睡眠剥夺的状态了。
The melancholy could then settle down and make it easy for you to fall into the routine.
随后这种郁闷可能就平复了，你很容易地就回到了日常生活中。
Think of ways they could misuse their toys and see if they fall apart when you put them through their paces.
想一想孩子们会用哪些不当的方式玩玩具，当你照孩子们的方式这么做时，看看玩具是不是会坏掉。
So you could well find yourself suffering as a result of swine flu even if you don't fall ill.
所以即使没有患病，你最终也将受到甲流的影响。
Humans are however not robots and so that often leads to more stress and to little of the recharging that could have helped you to keep doing quality work during the fall and winter being done.
然而，人类并不是机器人，所以这通常会导致更大的压力，而且不愿意让自己休息，而这种休息本可以帮你在秋季和冬季保持更有质量的工作。
When your teeth fall out in a dream, it could signify that you feel ill-equipped to break down the knowledge that you have available, that the way you break things down has changed.
当在梦中你的牙掉了，这可能意味着你并未充分准备好消化你所拥有的知识，或者你消化东西的方式发生了改变。
You could have broken your fall with your hand but might have done what I recently did in a fall and fracture your wrist and damage tendons in your hand.
你是可以用手撑住自己不摔跤，但是也许就会落得跟我一样的下场：腕关节折断，手部肌腱受损。
You shouldn't act as if you're worried that any disagreement could make the whole relationship fall apart.
你不应该表现得像你担心任何分歧可能会使关系崩溃。
Hold on and protect your head with a pillow, unless you are under a heavy light fixture that could fall.
等候并用枕头保护你的头，除非你在一个可能坠落的重型灯具下面。
Never underestimate the power of some fresh air - especially in the fall or early spring when you could describe the temperature as being "crisp."
永远不要小觑新鲜空气的能量，特别是秋天以及早春，你会把温度形容成“清新的”。
"He just needed to be given the tools, but you could tell that he had a lot of upside, " Fall said.
他只需被教授方法，但你能辨别出他潜力巨大。
Chances are you fall somewhere in the middle: you have good days and bad days, and you could definitely be happier than you currently are.
但更多可能是你处于两难之间：工作时既有快乐日子也有痛苦日子，而又幻想肯定比现在快乐的多。
If you are in bed when the earthquake strikes, stay there. Hold on and protect your head with a pillow, unless you are under a heavy light fixture that could fall.
如果地震发生时，你在床上，留在那里不要动，用枕头护住你的头部，除非你正好在一个可能会落下来的重型灯具的下面。
But I don't believe, I don't believe. I could still fall in love with you.
但我不信任，我不相信。我仍能与你共浴爱河。
If you store a battery when it's fully discharged, it could fall into a deep discharge state, which renders it incapable of holding any charge.
如果你在电池完全放完电的时候存放，电池将进入深度放电状态，这将造成电池不能再充电。
You could be sitting in class or eating a meal, and fall asleep without warning, usually for a period lasting for a few seconds to a few minutes.
你可能正在课堂上，或者是正在进餐，然后忽然就睡着了几秒钟或者几分钟。
You could be sitting in class or eating a meal, and fall asleep without warning, usually for a period lasting for a few seconds to a few minutes.
你可能正在课堂上，或者是正在进餐，然后忽然就睡着了几秒钟或者几分钟。
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