Shopping online has its disadvantages, such as unsafety.

网络购物也有缺点，比如说不安全。

Unsafety behavior is one of the main causes of injury accident.

分析人的不安全行为是造成伤亡事故的重要原因。

The low volume-weight of the embankment dam is an factor of unsafety of Andi Reservoir Project.

该工程由于坝体填土的干容重偏低，故十分担心其安全问题。

The problems of high consumed energy and unsafety of the existing water heater is mainly solved.

主要解决现有热水器耗能高或不够安全的问题。

At last to control the occurrence of food unsafety events in the countryside by prevention and treatment.

从而从防治多方面着手控制农村食品不安全事件的发生。