想想卡尔·齐默周二在《科学时报》上发表的文章中描述的果蝇实验吧。
Consider the fruit-fly experiments described in Carl Zimmer's piece in the Science Times on Tuesday.
果蝇在家中招人讨厌，但却是一个历史悠久的实验对象。通过研究果蝇，科学家们得以揭开胚胎发育的秘密。
Studying the fruit fly, a household nuisance but a time-honored experimental subject, has enabled the secrets of how embryos develop to begin to be unraveled by scientists.
特拉维夫大学通过重做这个实验还发现，不同进食对果蝇求偶对象选择的影响只会持续一代或二代，而不是一整年。
The repeat experiment carried out by the Tel Aviv University researchers shows that this dietary influence takes effect within just a generation or two rather than over an entire year.
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