Polyalkane
聚链烷
🗣️ 情景例句
George Washington sat at that desk
George Washington曾坐在那
To catch the ball
捕球
Many owners of private cars are going to offer 'free rides' to people on their way to work.
很多私人汽车的车主正准备为乘车上班的人们提供“免费乘车”的服务，