经常爬楼梯、离商店远一些的泊车位都是消耗卡路里简易可行的办法。
Taking the stairs more often and parking farther away at the store are simple ways to burn more calories.
科学工作者基于滑板和铰链连杆机构，设计了一种可同时在平地和楼梯上使用的简易多功能逃生椅。
Based on skateboards and hinge linkages, a simple multifunctional evacuation chair is designed, which can be used both on ground and down stairs.
介绍简易实用型水库工作桥楼梯结构新型式。
A practical stair structure of sluice operating bridge was introduced.
介绍简易实用型水库工作桥楼梯结构新型式。
A practical stair structure of sluice operating bridge was introduced.
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