It's hard to stay ahead of the game in network security when the landscape is constantly changing.

当形势不断变化时，在网络安全领域保持领先地位是困难的。

youdao

I was finding it hard to stay awake.

我已困得难熬。

《牛津词典》

The kids found it hard to stay still.

孩子们觉得待着不动很难做到。

《牛津词典》

"It's hard for me to move out when we're supposed to stay here."

VOA: standard.2009.10.07

It's not that hard to stay in touch.

保持联系不算难。

一起长大的朋友 - SpeakingMax英语口语达人

Be they powerful companies or players, it's very hard to stay on top forever.

FORBES: Political Economy

It's hard to stay depressed in a place where the food is so good and scuba so plentiful.

CNN: ASIANOW - TIME Asia | Culture on Demand: Swinging Thailand

Ms. COMDEN: (As Claire de Loon) (Singing) I try hard to stay controlled, but I get carried away.

NPR: Songwriter Betty Comden