Std.
[医] 皮肤试验剂量
🗣️ 情景例句
That's right.
对了。
Has he studied French very long?
他学习法语很长时间吗？
The main school holidays are from mid-December till early February when the days are long and warm.
学校主要的假期从12月中旬起至第二年的2月初为止，这段时间白昼很长，气候也暖和。