learn about得知有关…的消息
例句：We only learned about your intended visit yesterday.
我们昨天才听说你们准备来访。
2. Many people from my hometown go home for family reunion during Spring Festival, and some of them drive home; therefore, we want to take part in this carpooling project.
take part in参加…, 参与…活动
例句：John takes part in many school activities.
约翰参加很多学校里的活动。
3. Fortunately, the carpooling campaign has provided Mr. Liu the chance of sharing the trip home with Mr. Tan who is driving back to their hometown in Hunan province.
drive back驾车返回, 驱车返回
例句：He drove his car back.
他驾车回来了。
4. Some people who received rides last year, have now acquired cars and hope to help out people who couldn't buy a train ticket.
help out帮助, 帮助…出来
例句：Don't count on other people to help you out of trouble.
别指望他人能帮你摆脱困境。
5. This is the second year that the non-profit alliance has matched car owners with passengers headed for the same destination.
head for朝…进发
例句：He put on his coat and headed for the door.
他穿上大衣向门口走去。
6. Those who decide to participate in the campaign sign a contract specifying the responsibilities before they start the trips and are covered by insurance paid by the organizer.
participate in参加
例句：The people are demanding a chance to participate more in government.
人民要求更多的参与政事的机会。
7. When the traditional means of getting home - air and rail - fall short of the demand during the Spring Festival travel rush, car-pooling becomes increasingly popular.
fall short of不足,缺乏,达不到,不符合
例句：Now, our supply fall short of demand.
现在，我们的产品供不应求。
