Astm
[化] 美国材料试验学会
🗣️ 情景例句
Stocks, shares and bonds are good alternatives for personal investment.
储蓄、股票和债券是个人投资很好的选择。
I often go to school in the morning.
我常常在早上去学校。
Above the surface of the water, the towers rise to a height of nearly 700 feet.
塔身高出水面将近700英尺。