你最喜欢哪一个？
你们中间哪一位是王先生?
哪一个会做的更好？
The difficulty is which one to choose.
困难的是要选择哪一个。
哪一个更重？
哪一个更大？
How you going to know which one to go for?
你怎么知道该选哪一个呢？
No matter which one you are, it is at both extremes.
不管你是哪一个，都是在两个极端。
Rather speak of something at which one may laugh heartily.
说一些让人开怀大笑的事情吧。
A symbiotic relationship is an interaction between two or more species in which one species lives in or on another species.
共生关系是两个或多个物种之间的相互作用，其中一个物种生活在另一个物种体内，或依靠这一物种生活。
Gause performed numerous tow-species experiments in the laboratory, in which one of the species became extinct when only a single kind of resource was available.
高斯在实验室里进行了许多双物种实验，其中一个物种在只有一种单一资源的情况下就灭绝了。
Barcoding is a technique in which one or more short gene sequences, taken from a well-characterized portion of the genome, are used to identify a species through DNA analysis.
测序是一种技术，它是从具有明确特征的基因组提取的一个或多个短基因序列，并通过DNA 分析来识别一个物种。
He dictated a letter, which one of his clerks wrote out a beautiful round hand, and then the two brothers sat at the window a whole day watching for the right man to give it to.
他口述了一封信，其中一个员工用漂亮的圆体字写了下来。接着，两兄弟在窗边坐了一整天，等待把信交给一位合适的人。
"You go down that passageway over there."—"Which one?"
“你顺着那边的过道走。”—“哪个过道？”
哪个是在前面的？
哪个更快呢？
Which one of the two products do you want?
这两种产品你想要哪一种？
Which one do you prefer, black tea or green tea?
您想要红茶还是绿茶呢？
Which one would you like, black coffee or black tea?
你喜欢喝什么，黑咖啡还是红茶？
Which one will you choose to be, a carrot, an egg or coffee?
你会选择胡萝卜、鸡蛋还是咖啡？
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