tonelessly

1. ADJ-GRADED 缺乏声调的;平板的;单调的
   A toneless voice is dull and does not express any feeling.
   1. 'What shall we do?' Milton said again in a toneless voice.
      “我们该怎么办？”米尔顿又用平板而单调的声音问道。

1. ` Come in, 'she said tonelessly.
   对。。。说来丢脸的是‘进来，’她沉闷地说。

adv

1. in a monotone
   1. `Come in,' she said tonelessly