Quadracycline
盐酸四环素
🗣️ 情景例句
Today, trade imbalance between the United States and our country is becoming worse.
当前美国与我国间的贸易不平衡问题正日益恶化。
His visit was well timed.
他的访问正合时宜。
So was born the echo-sounding apparatus, now in general use in ships.
这样就产生了目前各种船舶上普遍应用的回声探测仪。