quickly
迅速地
a car flashed past them at speed.一辆车从他们身边疾驰而过。
a car flashed past them at speed.
一辆车从他们身边疾驰而过。
Operating at maximum speed.
以合适的速度或标准生产某物或执行某事
&I{Informal} Fully informed of or conversant with
【非正式用语】 悉知的,熟悉的
I'm not up to speed on these issues yet.我对这些事情还不熟悉
I'm not up to speed on these issues yet.
我对这些事情还不熟悉