2 sentences

1. 她留着一头乌黑的青丝。

   tā liú zhe yī tóu wū​hēi de qīng​sī.

   She has a head of jet-black hair.

   Source: Dong Chinese Dictionary

2. 奶奶虽然已经六十岁了，但依然保持着一头乌黑的青丝。

   nǎi​nai suī​rán yǐ​jīng liù​shí suì le, dàn yī​rán bǎo​chí zhe yī​tóu wū​hēi de qīng​sī.

   Although Grandma is already sixty, she still maintains a head of jet-black hair.

   Source: Dong Chinese Dictionary