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- To fail to keep up a pace; lag behind. 落后跟不上步伐；落后
- To fail to keep up a pace;lag behind. 落后跟不上步伐；落后
- To fail to keep up a pace;straggle. 跟不上；落伍
- The soldiers kept up a steady fire. 士兵们不停地射击。
- To fail to keep up a pace; straggle. 跟不上；落伍
- They kept up a good head of steam. 他们把蒸气压力保持在所需的水平上。
- He keeps up a running commentary on my attempt to get the machine go. 他对我试图把那辆机器开动不断地发表意见。
- Her company has built up a customer base of 90,000. 她的公司已建立起一个9万人的客户网。
- I've kept up a friendship with a girl I was at school with twenty years ago. 我一直同工同20年前上学时的一位女同学保持着友谊。
- From the passenger seat, he kept up a running commentary on her driving. 他坐在乘客座位上评论她的驾驶技术。
- keep up a custom 坚持一种风俗
- It must be very costly to keep up a large house like this. 维修这样一所大房屋一定得花不少钱。
- We kept up a correspondence for many years. 我们保持了很多年的通信联系。
- They kept up a good headof steam. 他们把蒸气压力保持在所需的水平上。
- The rebel forces kept up a crazy fire. 叛乱者们持续疯狂的射击。
- He kept up a correspondence with Tom. 他和汤姆保持通信联系。
- They kept up a regular correspondence. 他们维持经常的通信。
- The soldiers kept up a steady fire . 士兵们保持连续射击。
- How do you keep up a house as large as this without help? 没人帮忙，你能保养好这么大一所房子?
- They kept up a sturdy opposition to the plan. 他们坚决反对这个计划。
