n. 储备;保护区;保留;替补队员;
vt. 储备;保留;预约;
vi. 预订;
adj. 保留的;预备的;
re再+serve服务,保持→再留住→预定n. 内向,沉默寡言
🗣️ 情景例句
I'm leaving for Beijing on a four-day tour.
我马上要去北京旅游4天。
They are so busy these days, that they don't even have time for their friends.
他们最近忙得没法和朋友见面。
A burst of activity associated with the laying of submarine cables soon confirmed the Challenger's observation that many parts of the ocean were two to three miles deep,