He mumbled something to me which I did not quite catch.

他对我叽咕了几, 我没太听清楚。

Mr. Bosher, with his mouthful of biscuit, mumbled that it was sweetly pretty.

伯希尔先生满嘴塞着饼干，叽叽咕咕地说这真是美极了。

As she denounced the government's policy, the crowd murmured their approval.

当她抨政府的政策时, 听众叽叽咕咕地表示赞同。