Hantigen
鞭毛抗原
🗣️ 情景例句
and ... and when the baby comes,
而且……而且婴儿出生以后，
He's concentrating on learning English.
他集中精力学英语。
We enjoy staring at them, entranced as they go about their business, unaware (we hope) of our presence.
我们喜欢入迷地看它们做事，它们不知道（但愿如此）我们就在它们身边。