婉转 + 的 + Noun
The adjective 婉转 (wǎnzhuǎn) describes something that is 'sweet and smooth,' 'gentle and flowing,' or 'tactful.' When describing sounds or singing, it means the tone is soft and pleasing with graceful turns. It can also describe a gentle, indirect way of speaking.
她用婉转的语气拒绝了邀请。
Tā yòng wǎnzhuǎn de yǔqì jùjué le yāoqǐng.
She declined the invitation in a tactful tone.
树林里传来婉转的鸟鸣声。
Shùlín lǐ chuánlái wǎnzhuǎn de niǎomíng shēng.
The melodious sound of birdsong came from the woods.
这首曲子旋律婉转,非常好听。
Zhè shǒu qǔzi xuánlǜ wǎnzhuǎn, fēicháng hǎotīng.
This piece has a graceful melody and sounds very beautiful.