Non-European players are not asked to travel outside the continent for friendlies more than once a season—which explains why teams such as Argentina and Brazil sometimes play in Europe.

非欧籍球员每个赛季只允许外出参加一次友谊赛，这就是为什么一些球队像阿根廷和巴西会来到欧洲题比赛。

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Gardeners meet several times over the growing season, once for a formal start-up, then a few times over the summer for informal pot luck dinners and an annual open house.

园丁们在生长季节组织几次会面：一次正式启动仪式，然后在夏季期间组织几次非正式的便餐会及一年一度的露天酒会。

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One's love for a city can depend on the season once arrives in a city.

一个人对一座城市的爱有时候取决于当他踏上这座城市时所处的季节。

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And,he warns there will be outbreaks of diseases such as diarrhea, meningitis and malaria once the rainy season starts in a couple of months.

VOA: standard.2009.03.28

And once you... when you're having that bad of a season, it's really hard to get everyone passionate about it,

所以一旦赛季取得很差的成绩，就很难保持球队的激情，

足球部队长的领导力 - SpeakingMax英语口语达人

And that is a commitment that we can renew once again during this holy season."

VOA: standard.2009.09.02

New products would be shipped to Sunglass once a season and sit on the shelves for months.

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He was usually able to snag that box for us once or twice a season, including this day.

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That only happens once or twice a season, our driver told us.

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