“呃”怎么读

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贵重的展品，呃哼，丢失的话，会众人皆知。It is not unknown for valuable display items to go, ahem, missing.我是，呃，6月底来到这里的。I've been here, oh, since the end of June.我想我应该，呃，和你谈谈。I thought I'd, you know, have a chat with you....