He shouldn't be doing heavy manual work at his age.
在他这个岁数，不应该再干重体力活了。
In those early pioneering days, much of port activities relied on Chinese migrant coolies to do the heavy manual work.
在最初开拓的岁月里，很多港口作业都是靠那些从中国移居到当地的苦力用繁重的体力劳动来完成的。
Material transport is a heavy and complicated work, the traditional mode of transportation required manual, it's a waste of human resources and high-risk factor.
物料运输是一项繁重复杂的工作，传统的物料运输方式需要人工操作，不仅浪费人力资源而且危险系数高。
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