Astm specifications
[化] 美国材料试验学会技术规范; ASTM技术规范
🧩 词语组成解析
[化] 美国材料试验学会
n. 规格, 规范, 明细单, 说明书, 详细的计划书
🗣️ 情景例句
You're growing so fast, Michelle.
长得太快了， Michelle。
All things are difficult before they are easy.
凡事必先难后易。
He has never borrowed money from me.
他从未向我借过钱。