fair weather
adj. 晴天的(只适宜于好天气的)
例句与用法：
In fair weather or foul.
好天气或坏天气
A bank is a place where they lend you an umbrella in fair weather and ask for it back again when it begins to rain.
银行，是在天晴之时借伞给你、到了下起雨来之时就催你还回去的地方。
After rain comes fair weather.
雨过天晴; 否极泰来。
Fair weather was the rule yesterday.
昨天天气普遍晴朗。