Polyalkane
聚链烷
🗣️ 情景例句
Oh, you've been here before.
噢，你以前来过的。
A man without a smiling face must not open a shop.
人无笑脸，不要开店。
This result merely confirms earlier American and British studies:
结果仅仅确认了美国人和英国人早期的研究：