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
and it's only about an hour's drive from here.
而且从此地到那里只有大约一小时的车程。
A man has his hour, and a dog has his day.
人有称心时，狗有得意日。
What will be the population of these countries by the end of the twentieth century?
到20世界末较发达国家的人口将是多少？