Bct
abbr. 商务汉语考试（Business Chinese Test）；体心四方晶格（Body -Centered Tetragonal）；带宽压缩技术（Bandwidth Compression Technique）
🗣️ 情景例句
Not at all.
不客气。
There's many a slip between the cup and the lip.
天有不测风云。
It was Sunday.I never get up early on Sundays.
那是个星期天，而在星期天我是从来不早起的，