Aerodynamic diameter
[化] 空气动力直径
🧩 词语组成解析
a. 空气动力学的
🗣️ 情景例句
Because the United States is the most important trade partner.
因为美国是我们最重要的贸易伙伴。
It is the first step that costs.
万事开头难。
The weather can be quite warm in autumn.
秋天，气候十分暖和。