Methanometer
甲烷计; 沼气检定器
🗣️ 情景例句
She doesn't know we've changed hotels.
她不知道我们换了旅馆呀。
This is Tom. He's my classmate.
这是汤姆。我的同学。
I had come ten miles since leaving the town,
从小镇出来，我走了10英里。