🧩 词语组成解析
brain
[bren]
n. 脑;智慧;聪明的人;（群体中）最聪明的人;
vt. 打破…的脑袋;打…的头部;
doctor
['dɑktɚ]
n. 医生，大夫;博士;神学家;医疗设备;
vt.& vi. 医疗，行医;
vt. 修理，装配;假造;搀杂;修改，修饰;
doct教+or表名词，人→教的人→有学问的人→ 博士，医生
🗣️ 情景例句
used for new books
被用来购买新书
Not only did he make a promise, but he also kept it.
他不仅许下诺言，而且遵守了。
Now Wu Peng from Class 1 was in front! Not far behind him was Lin Tao.
现在1班的吴鹏在前边！紧追其后的是林涛。