Doolittle equation
[化] 杜利特尔方程
🧩 词语组成解析
杜利特尔（姓氏）
🗣️ 情景例句
I received a letter from my parents this morning.
今天早上我收到父母一封信。
Buyers, generally speaking, bear the change of packing.
一般来说，买方应承担包装费用。
I don't know. My head hurts.
不知道。我头痛。