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必须采取各种措施，改善人们的工作条件，提高人们的生活水平。Different kinds of measures must be adopted in order to improve people’s working conditionsand to raise their living standards.

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这种措施加上良好的、全面的田园卫生是兰花栽培者对非常有价值的、生命周期长的兰花进行修建、分苗、繁殖时必须采用的。This practice, along with good general sanitation, is strictly adhered to by orchid growers who do a great deal of pruning, dividing, and propagating of very valuable, normally long-lived orchid plants.

冰所占的体积比水所占的体积大，而冰又是由水结成的。Ice occupies more space than the water from which it has been formed.

在劳动密集型的农业中大部分的劳动力显示出很低的生产率水平，这种农业生产方法正在改变中。Much of the labor force in labor-intensive agriculture, which methods of production are changing, shows a very low level of productivity.

由于不同的水果或蔬菜都有其所特有的最佳包装空气浓度，即各有各的二氧化碳和氧气的最佳浓度及可容浓度，因此，挑选一种能在密封保鲜袋内适度调节空气，延缓包装食品变质的可透性塑料是十分重要的。Because each different type of fruit or vegetable has its own optimum atmosphere--its own optimum concentrations of carbon dioxide and oxygen and its own tolerances-- it is important to select a film which modifies the atmosphere within the sealed package to the correct extent to retard changes associated with deterioration.