It is not unknown for valuable display items to go, ahem, missing.珍贵展品也不是没有——呃哼——丢失过。

It can be a dangerous course of action which might be sound in theory but – ahem – is perhaps a trifle risky in practice.这可能是一种危险的做法, 在理论上也许可靠, 但是, 呃哼, 在实践中大概有些风险。

Ahem, ahem, is there anyone serving?呃哼, 呃哼, 有没有人招待一下客人啊？