Null check
[计] 零检验
🧩 词语组成解析
check
[tʃɛk]
vt. 检查，核对;制止，抑制;在…上打勾;
vi. 核实，查核;中止;打勾;[象棋]将一军;
n. <美>支票;制止，抑制;检验，核对;
🗣️ 情景例句
Will you please try to relax?
能不能放轻松些？
To study the map
研究地图
No, I think it is going to be mailed to your local branch.
不，寄到分社。