synchromesh change gear

例句：

1. 1. The car's engine is synchromesh with the transmission.
   汽车的发动机与变速箱是同步的。
2. 2.The engineer synced up the new system with the old one.
   工程师将新系统与旧系统同步。
3. 3. The team synced down the project schedule to meet the deadline.
   团队将项目时间表同步，以符合截止日期。