2 sentences

1. 他已长成一个壮汉。

   tā yǐ zhǎng​chéng yī​ge zhuàng hàn.

   He has grown into a strong man.

   Source: AI Challenger 2017

2. 每一棵树都是从一粒种子长起来的，变成树苗，最终发展成为一棵完全长成的树。

   měi yī kē shù dōu shì cóng yī lì zhǒng​zi zhǎng qǐ lai de, biàn​chéng shù​miáo, zuì​zhōng fā​zhǎn chéng​wéi yī kē wán​quán zhǎng​chéng de shù.

   Every tree grows from a seed, becomes a sapling and eventually develops into a fully-grown tree.

   Source: CCMatrix