up是什么意思音标:英 [ʌp]美 [ʌp]
a. 向上的, 起床的, 涨的
adv. 向上, 上涨
prep. 在...上面, 向...的较高处
v. raise
a. being or moving higher in position or greater in some value; being above a former position or level
s. extending or moving toward a higher place
s. (usually followed by `on' or `for') in readiness