"Their sound is very interesting," he says, diplomatically.是什么意思？

"Their sound is very interesting," he says, diplomatically.

他很圆滑地说道，“他们唱得不错。”

their

pron. 他（她，它）们的，在提及性别不详的人时，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

sound

n. 声音，声响，音调，声调，声波，嘈杂声；vi. 响，发声，听起来，好像，回响，[音乐]乐器等被奏响；vt. 使出声，使发声，清楚地发出，宣布，发表，颂扬；adj. 健全的，合理的，完好的，无损的，明智的；adv. 彻底地，充分地；

例句
Their sleep is regularly disturbed by the sound of gunfire as criminal gangs settle their nightly accounts.
他们经常被黑帮每晚火拼的枪声所吵醒。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

very

adj. 很，非常，恰好是，正是，十足的，特有的；adv. 很，非常，充分，完全；

例句
Most people have very little difficulty in seeing why a Van Gogh is a work of genius.
多数人不难理解为什么凡·高的作品是天才之作。

interesting

adj. 令人感兴趣的，有趣的，引起兴趣的，有趣的，令人关注的；

例句
I never had a long-term relationship as I wasn't good enough, or interesting or amenable enough.
因为我不够优秀，不够有趣或者不够亲切，所以恋爱关系从来都维持不长。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

says

v. 说，讲(say的第三人称单数)；

例句
'When I was an adolescent,' says a thirty-one-year-old man, 'I thought girls held all the aces.'
“当我还是个毛头小伙儿时，”一个31岁的男人说，“我觉得完全是女孩子说了算。”

diplomatically

adv. 外交上，外交地；

例句
He told the artist diplomatically that his ugly picture was " unusual ".
他圆滑地对画家说,他那张难看的画很 " 独特 ".