Dip your head or you touch the low arch.

低下头，否则要碰到低矮的门拱的。

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Dip your head under the low arch.

在低矮的门拱下要低头。

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The minimum temperature could dip to as low as 9 degrees on Wednesday.

下周三最低气温可能下降到9度。

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The minimum temperature could dip to as low as 9 degrees on Wednesday.

下周三最低气温可能下降到9度。

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