Disease is a constant issue for growers; but new regulations are likely to curb the use of chemical treatments.

对于葡萄种植户而言，病害一直都是他们最为担忧的事情；但是这个时候，相关的规定又似乎要限制农药的使用。

youdao

There is another issue too. Einstein introduced the speed of light as a mathematical constant, c.

还有一个另外的问题。

youdao

The second issue is circumvented by sending a "keep-alive" or "sync" message at constant intervals to fool the browser into thinking that data is coming at a slower rate.

第二个问题可通过“保持活动”或按固定间隔“同步”消息来欺瞒浏览器，使浏览器认为数据是以较慢的速率传入的。

youdao

So this something that is a constant issue that the administration presses with China.

WHITEHOUSE: Press Briefing

The only serious and constant issue with RealJukebox (free or Plus) is that it seems to be a resource hog.

CNN: RealJukebox: MP3 for dummies

Sai Deepak Bhimaraju, from Delhi, India, found no issue with the constant sunlight when he was in Trondheim, Norway for a two-month summer internship.

BBC: Living in towns without light