🧩 词语组成解析
[医] 焦耳氏当量(热功当量)
[医] 电子\\n[经] 东
n. 约翰斯顿（姓氏）
🗣️ 情景例句
when the dog scratched on the front door.
当那狗在抓前门时。
Money is often lost for want of money.
往往由于缺乏金钱而丧失金钱。
He did not look up from his desk when I entered.
我进去的时候，他连头也没抬。