崖沙燕是一种褐羽白腹的鸟。The sand martin is a brown bird with white underneath.燕麦麸在去年成为保健狂人的最爱。Oat bran became the darling of health freaks last year.一燕不成夏.One swallow does not make a summer....

“燕”的拼音为：yàn...

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