A major concern is to alleviate environmental pollution and restrict the deteriorative tendency the 21 st century.进入21世纪以来,减轻环境污染和遏制生态恶化趋势已成为人们关注的焦点....
Sailors hung about while they waited to ship out.水手们在等待离港的时候四处闲逛。A thick haze of acrid smoke hung in the air.空气中弥漫着刺鼻的浓烟。He said he'd call again, and hung up on me.他说他会再打过来，就突然挂断了电话。...