As they are very prone to blackspot, spraying is necessary.

因为它们很容易受黑斑病侵害，所以必须喷药。

youdao

The blackspot shown in the photos was caused when molding the white base of the nozzle.

照片中显示的黑点是注塑喷嘴的白底座时造成的。

youdao

The epidemiological aspect of rose blackspot was investigated systematically for 14 months by means of grading and replacing of branch samples.

本试验采用对样枝分级，且不断更替的取样方法，进行了14个月的月季黑斑病流行的系统调查。

youdao

The plans will ease congestion around the Iron Bridge - which is a notorious accident blackspot.

BBC: The iron bridge on Goss Moor

Since 2003 Blackspot has sold only 20, 000 pairs, which is about what Nike sells in an hour.

FORBES: Magazine Article

The Churchill Gardens estate where he lived has become a drugs blackspot in the last year, said Mr Savizon.

BBC: Pimlico stabbing: Teenage boy dies