Variation method
[计] 变分法\\n[化] 变分法
🧩 词语组成解析
🗣️ 情景例句
Where did this money come from?
这些钱从哪来？
The doctor advised me to drink plenty of water.
医生劝我要多喝水。
They play it like this, six students stand in a row in front of the class.
6个学生在全班前面站成一排。