🗣️ 情景例句
You'd better watch your step or you'll get into trouble again.
你最好留点儿神， 免得再惹麻烦。
He is studying the ecology of ameba.
他在研究阿米巴
After lunch Aunt Huang came in and she looked worried.
午饭后黄阿姨来了，她面带愁容。