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There's a huge amount of variation in present-day dogs.现代的狗类有着数量众多的变种
huge amount of:大量的
They spent a huge amount of money on that villa.
他们花巨款买下了那幢别墅。
The Sun produce huge amount of energy.
产生如此巨大能量的原因。
then that may have been slightly selected upon to create与其他狼共同繁衍,然后就此轻微地影响了物种的进化
upon:紧接着；逼近
Upon his release, Davis went immediately to his mother.
戴维斯一被释放就立即回到了母亲身边。
Christmas is almost upon us again.
圣诞节又快到了。
词汇搭配:
act upon按照
upon condition that如果
agree upon就 ... 达成一致...
once upon a time从前
upon that于是
