Technique maintenance; Control to break down; System maintenance.

技术维护；掌握故障；系统维护。

youdao

They wanted to optimize conditions for the fungi to break down polycarbonate, so first they treated the plastic with ultraviolet light and heat. Untreated polycarbonate served as a control.

科学家们选择了三种已用于清洁环境的真菌，他们想优化真菌分解聚碳酸酯的条件，这对要费力处理持续性污染物来说可是个不错的消息。

youdao

None of this is a guarantee that the Belgrade regime is about to fall, but it does suggest that it could lose control if Serbia's infrastructure starts to break down.

ECONOMIST: NATO piles it on