2 sentences

1. 尽管希望渺茫，他仍然决定最后再试一次。

   jǐn​guǎn xī​wàng miǎo​máng, tā réng​rán jué​dìng zuì​hòu zài shì yī cì.

   Although the hope is slim, he still decided to try one last time.

   Source: Dong Chinese Dictionary

2. 烟波渺茫的大海上，有一艘小船在独自漂泊。

   yān​bō miǎo​máng de dà​hǎi shàng, yǒu yī sōu xiǎo​chuán zài dú​zì piāo​bó.

   On the vast, misty sea, a small boat is drifting alone.

   Source: Dong Chinese Dictionary