Astm standards
[化] 美国材料试验学会标准; ASTM标准
🧩 词语组成解析
[化] 美国材料试验学会
n. 标准；规格（standard的复数）
🗣️ 情景例句
Tom is studying photography at NYU. Tom
正在NYU学摄影。
I didn't realize the time had passed so quickly.
我没有认识到时间这样快速过去了。
I went downstairs and sat in front of the television pretending to read.
便来到楼下坐在电视机前假装看书。