Monogene
单成因的
🗣️ 情景例句
Mmm-hmm. Thanks.
嗯。谢谢。
He gets more professional satisfaction from teaching.
从事教育职业，他更感受到职业上的满足。
This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it.
因为如果有列火车开进隧道，它就把新鲜空气随之抽进了隧道。