If it walks like a duck and quacks like a duck, it must be a duck.
如果它像鸭子一样走路,像鸭子一样呱呱叫,那它一定是一只鸭子。
If you want to be an excellent runner like Liu Xiang, you must be in good health and be prepared to go through much hard work.
如果你想成为一名像刘翔一样优秀的运动员,你必须保持身体健康,准备好经受大量刻苦的训练。
Care must be taken when trimming around woody plants like shrubs and trees.
修剪像灌木和乔木这样的木本植物必须小心翼翼。
But he added that they must use the money to support services like police, fire, education and health care.
VOA: special.2009.01.09
And because the experimenters were saying the experiment must go on and very often had a white cloak like doctors or experimenters-- a cloak around them.
因为实验者说实验必须进行下去,而且实验者经常穿着一件白大褂-,就像医生或者实验者。
Like a wild horse he must be caught, tamed and domesticated.
就像野马要被捕捉,驯服,驯化一样
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