针对我国港口和电厂煤码头多次门机主臂架折断事故，从现象分析入手，确定其均为局部失稳而引起整体破坏。
The analysis made in the paper shows that many accidents on the portal cranes furnished to the harbours and power plant coal wharfs in China are caused by the buckling in their main jibs.
从那里简单地询问一下到坎门的当地公共汽车，然后从港口码头乘船，半小时就能到达大鹿岛。
From there it is a simple question of taking the local bus to the area known as Kanmen, and a boat from Matou Harbour will whisk you away to Deer Island in half an hour.
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