Gnotobiotic
a. [生]限菌動(dòng)物的,無菌動(dòng)物的, ( 動(dòng)物或其環(huán)境)限菌的,無菌的
??? 情景例句
Turn the key before you pump the pedal, or you'll flood the engine.
加水之前轉(zhuǎn)動(dòng)鑰匙，要不發(fā)動(dòng)機(jī)就給澆滅了。
It's time to begin.
到開始的時(shí)候了。
Finally, turn off the lights and lock the door.
最后，關(guān)上燈，鎖好門。