Efficacity
n. 效力, 功效
🗣️ 情景例句
when Susan and Richard were babies?
当Richard和Susan还很小时？
Mother begins baking cookies two weeks before Christmas.
自圣诞节的两周以前，母亲就开始做小甜饼了。
'What are you doing?' she asked.
你在干什么？她问