keep up on

• 跟上； 不落后

keep up on的用法和样例：

例句

1. I was put to it to keep up with his pace.
   我跟上他是不容易的。
2. They had to bring the card index up to date.
   他们使得索引卡片跟上发展，不致过时。
3. I had to run to keep up with the girls.
   我得跑以跟上女孩子们不落后。
4. While research on plants has taken the lead, work with farm animals does not lag far behind.
   尽管植物的研究工作领先一步，牲畜的研究工作也并不落后。