首先，他们用基因手段禁止了细胞受体的活动——细胞受体即那些向其他细胞发送和从其他细胞接受信号的分子们——因为雌激素和雄激素存在于正在发育的老鼠胚胎的肢芽中。
First, they used genetic tools to deactivate cell receptors-molecules that send and receive signals to and from other cells-for testosterone and estrogen in the developing limb buds of mouse embryos.
积热也是测定落叶树和果树芽分生组织活动的有效手段。
Heat sum is. a useful measure of the onset of meris. ematic activity buds in deciduous and fruit trees.
笋的保鲜从来都是个很大的麻烦，笋只是一个芽，是整个植物机体活动最旺盛的部分。
The way to retain freshness of bamboo is very hard. Bamboo shoots are only a kind of bud, which is the most vigorous part of the whole plant organism.
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