The most common emergence of odour comes from the Urban sewage system, mainly in the total pipelines and equipment for treatment.

城市废水管网系统中臭气的最常见的发生源主要有下水道总管道和泵站。

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The emergence of the common cranefly, universally known as the daddy long legs, failed again for the third time in three years.

普通盲蜘蛛，就是全球知名的外号叫“长腿叔叔”的蜘蛛，今年依然没有出现，这已经是连续的第三年了。

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Some common problems faced by many women and men is the emergence of pimples, black spots. black heads and itching on the facial skin and also on arms and legs exposed to the elements.

一些女人和男人都要面对的常见问题就是丘疹(粉刺)、黑斑、黑头和发痒长在面部皮肤、少量也长在无遮蔽的胳膊、腿上。

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There needs to be a re-emergence of common sense policies towards young offenders combined with the imaginative use of social penalties for law breakers.

BBC: Is youth crime out of control?

Although the papers collected here are wide ranging, they reveal the emergence of the concept of a common heritage and plural identity.

UNESCO: Culture

"While al Qaeda's various affiliates are enmeshed in their own local conflicts, hatred of the United States remains a common thread, " it added, citing the emergence of groups such as Al Qaeda in the Arabian Peninsula, the Islamic State of Iraq and Syria, Al Shabaab and Boko Haram.

CNN: Remembering fallen heroes of 9/11