(1)良好天气条件（GOOD WEATHER CONDITION），一般是以4级风为准。但100吨小船遇4级顶风, 航速会大减，而15万吨巨轮遇6级顶风对航速影响微小。
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The good crop last year was due to the improvement of farm management and favorable weather condition.
去年的好收成是由于农场管理的改进和有利的气体条件。
The next day, in clear weather, Crusoe is able to swim out to the wrecked ship which he finds loaded with useful supplies in good condition.
次日天气晴朗，鲁滨逊设法游到失事的船边，他发现满船的有用的物品依然完好无损。
In this particular region, there is an extremely wet and hot weather condition, 110 F and on the other hand, it is extremely difficult to find good labor except for the basic brick craft workers.
这个特殊地区的天气条件非常潮湿和炎热，气温高达华氏110度，另一方面，除了基本的砖工很难找到其他劳动力。
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