It is necessary for you to read all instructions carefully before every experiment.
你有必要在每次实验前仔细阅读所有的说明。
2
A later experiment added a new twist: cells that contained instructions on where to go to find food.
之后的实验又增加了花样：在电池网格中包含了到哪里寻找食物的指令。
3
My assistant, who had carefully read through the instructions before doing his experiment, could not obtain satisfactory result, because he followed them mechanically.