使用
to use; to employ; to apply; to make use of
实用
practical; functional; pragmatic; applied (science)
试用
to try something out; on probation
食用
food product; to use as food; edible
使用数量
usage (i.e. extent of use)
使用量
volume of use; usage amount
试用品
prototype; trial product; test sample
试用期
trial period; probation