例句與造句

1. Storage arrangements should permit segregation of different gases and of full / empty cylinders and permit rotation of stock on a first in ? first out basis
   儲存管理應(yīng)允許不同氣體間隔離，滿瓶和空瓶間隔離，應(yīng)本著先進(jìn)先出的原則在倉庫中周轉(zhuǎn)。
2. It's difficult to find rotation of stock in a sentence. 用rotation of stock造句挺難的