Energy consumption, congestion and pollution have increased.能源消耗、交通堵塞以及污染状况愈加严重。traffic congestion and pollution交通拥塞和污染Nose drops often relieve nasal congestion.滴鼻剂常可缓解鼻腔充血....
...nasal congestion.鼻塞Nose drops often relieve nasal congestion.滴鼻剂常可缓解鼻腔充血.A nasal spray or drops would ease your symptoms, but don't overuse them or further congestion could result...鼻腔喷剂或滴剂能减轻症状，但请勿使用过频，否则鼻塞可能会加重...
not have a leg to stand on的音标：not have a leg to stand on的英式发音音标为：[nɔt hæv ə leɡ tu: stænd ɔn]not have a leg to stand on的美式发音音标为：[nɑt hæv e lɛɡ tu stænd ɑn]...
溴化氢加成的最后一步,是负离子亲核试剂的附加.The addition of hydrogen bromide involves the attachment of an anionic nucleophile in the final step.关于加成的定向问题,可以一直追溯到自由基化学的起源.The problem of orientation of addition goes right back to the beginnin...