翻译成英文：他食量很大，在朋友家不敢放开尽情的吃，怕吓到朋友

He has a (very) big appetite, but he did not dare to eat freely in his friend's house, in fear of scaring his friend.

ta shi liang hen da ,zai pengyou jia bu gan fang kai jin qing de chi , pa xia dao pengyou

He was a great appetite, at a friend's house did not dare open up enjoy eating, fear frighten a friend.
呵呵 在线翻译帮忙的

he always eat like a horse,so he dare not enjoy himself in front of his friends at their home for scaring them.

这是我自个儿翻译的，仅供参考
He has a big stomach , but he didn't dare to filling himself in his friends' house, afraid of frightening his friends.