Homelessness is on the increase in many cities.

许多城市里无家可归者正在增加

With China's development and prosperity, the demand for Mandarin lessons is on the increase.

随着中国的发展和繁荣，学习汉语的需求也在增加。

Mugging is on the increase.

抢劫犯罪呈上升趋势。

Crime is on the increase.

犯罪活动日益猖獗。

Drink-drive deaths are on the increase again.

酒后驾驶引起的死亡再次上升。

Armed robbery and abduction have been on the increase countrywide.

持械抢劫和诱拐案件已在全国都有所上升。