New Words：
current ['kʌrənt] n.电流；趋势；水流；气流
Sample Sentences：
The swimmer was swept away by the current.
He swam to the shore against a strong current .
Birds use warm air currents to help their flight.
The current is strongest in the middle of the river.
New Words：
drift [drift] v. 漂移；漂流；飘
Sample Sentences：
Clouds drifted across the sky.
He hasn't decided what to do yet ─ he's just drifting.
The drift wood could have been drifting in the ocean currents for months or even years.
current ['kʌrənt] n.电流；趋势；水流；气流
New Words：
driftwood ['driftwud] n. 浮木；漂流木
Sample Sentences：
After the storm, there was a lot of driftwood washed up on the shore.
I know somebody who built his entire beach house out of other people's "trash" and driftwood . It's a cool house.
New Words：
chin [tʃin] n. 下巴；颏
keep one's chin up 不气馁
Sample Sentences：
She rested her chin on her hand.
He was so fat that he had a double chin.
His chin was completely covered by his beard.
She told me to keep my chin up, do the best I can, and don't get discouraged.
New Words：
charge [tʃɑrdʒ] v. 收费；充电
charge for 为……收费
Sample Sentences：
The store doesn't charge for delivery.
The restaurant charged £20 for dinner.
Before use, the battery must be charged.
How much do you charge for your eggs?