Pretersonics
[电] 高于500百万赫频率的声纳波
🗣️ 情景例句
How much will it be?
要多少钱？
Jeff will lose face if his friend fails to work hard.
杰夫因他的朋友不肯勤奋工作而丢了面子。
Then he put his hand into pocket, and took out a phrasebook.
然后他把手伸进了衣袋，掏出了一本常用语手册。