单词：contrails
(contrail 的复数) n. 凝(结尾)迹
plural of contrail
n. an artificial cloud created by an aircraft; caused either by condensation due to the reduction in air pressure above the wing surface or by water vapor in the engine exhaust
n. an artificial cloud created by an aircraft; caused either by condensation due to the reduction in air pressure above the wing surface or by water vapor in the engine exhaust
单词：contrails 相关文章
Airplane Contrails Have you ever seen a perfectly cloudless sky? Cloudlessthat isexcept for two or three long white lines smeared across the perfect blue sky by airplanes like smudges on a pane of glass. Why do airplanes sometimes leave contrails beh
发表于:2019-03-09 / 阅读(207) / 评论(0)
英语听力文摘 English Digest
英语听力文摘 English Digest