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 going to the baseball game today?
你今天要去看棒球赛吗？
I have received a letter from my cousin.
我收到了我表兄的信。
examined a very large number of men working on aircraft carriers:
调查了许多在航空母舰上工作的人，