第一极体

显微注射受精时第一极体位置和卵母细胞膜穿破类型对受精和胚胎发育的影响

小鼠卵母细胞第一极体的采集与保存

猪卵母细胞第1极体与核相对位置变化对去核率的影响

Not even the first stroke of the character is in sight; Nothing tangible is yet in sight.

be bent solely on profit; put profit first

first or last

First aid

people regard food as their prime want; food the first necessityof man

last-in first-out memory

first order kinetics

different first page