Certificateof testing
[化] 检验证书; 检验证明书
🧩 词语组成解析
testing
[['testiŋ]]
n. 测试\\na. 吃力的, 试验的
🗣️ 情景例句
I researched it for over a year.
我研究了一年多。
All our work was in vain.
我们白干了一场。
Are you holding the ladder, Jim?
你扶住了梯子吗，吉姆？