Global warming is caused by holes in the ozone layer and the steady buildup of carbon.
全球变暖是由臭氧层破洞和不断积累的二氧化碳造成的。
2
Sometimes lower die temperatures can create a cool layer of resin on the inner surface of the die that creeps slowly to the die exit and then separates from the bulk flow, causing buildup.
The window design contains a double layer of carefully oriented RF mesh screens to provide transparent like views, minimize pattern distortion, and prevent dust and particle buildup.