哦，呃，嗯（表示说话时的犹豫）
Er is used in writing to represent the sound that people make when they hesitate, especially while they decide what to say next.
例句
I would challenge the, er, suggestion that we're in third place...
我不太同意，呃，我们位居第三的说法。
People that are addicted to drugs get er help from the government one way or another.
那些吸毒上瘾的人，呃，以某种方式获得政府帮助。