In such a fast-changing business, it's hard to stay on top.

在一个变化如此迅速的行业里，要保持显要地位很难。

《柯林斯英汉双解大词典》

You can also link up with Google calendar to make sure you stay on top of important dates.

您还可以连接谷歌日历，这样确保您随时掌握重要的日期。

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Though taking care of her grandmother takes her lots of energy, Sally has tried to stay on top of all her courses.

尽管照顾祖母花费了她很多精力，莎莉还是努力在所有课程上保持领先。

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It denies America the game-changing products and world-changing discoveries we need to stay on top.

WHITEHOUSE: President Obama Speaks at the White House Forum on Women and the Economy | The White House

I'm just an average American, a cookie-cutter, average, United States-loving American and I want to make sure we stay on top as a superpower economically.

BBC: Swing states cook up trouble for Obama

Now, President Obama has ordered FEMA to stay focused -- going to the top of your question -- on helping Virginia recover and rebuild, and that's what this administration will continue to do.

WHITEHOUSE: Press Briefing