Validity check
[计] 有效性检查\\n[经] 有效性检查
🧩 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
That's music to my ears.
正合我意。
Are you in touch with him now?
你现在和他有联系吗？
The mobile phone is as popular as the beeper nowadays.
现在手机和寻呼机一样普及。