Blk
abbr. 黑色（black）；主动脉排空系数；坯料（blank）；空白表格（blank form）
🗣️ 情景例句
You are a terrific instructor, Jack.
你真是个了不起的教练 Jack。
I'll back you up.
我支持你！
Their sleeping bags were warm and comfortable, so they all slept soundly.
睡袋既暖和又舒服，所以，他们都睡得很香。