摘要:  a cup of foffee Do you need caffeine to get through your day? I’ve experienced every over-the-counter wakefulness supplement produced before 2007 (when I smartened up) and can promise you th[阅读全文]

摘要:alert, cautious, considerate这一组形容词都表示"小心的，谨慎的"。alert a.警惕的，留神的。The hostess remained standing, alert to every guests' drinking need.女主人一直站在旁边，时刻准备给大家斟酒。c[阅读全文]