4 sentences

1. 他从小就尝遍了人间的辛酸。

   tā cóng xiǎo jiù cháng biàn le rén​jiān de xīn​suān.

   He has experienced all the hardships of life since childhood.

   Source: Dong Chinese Dictionary

2. 这一路走来的辛酸，只有他自己最清楚。

   zhè yī​lù zǒu​lái de xīn​suān, zhǐ​yǒu tā zì​jǐ zuì qīng​chu.

   Only he knows the bitterness he experienced along the way.

   Source: Dong Chinese Dictionary

3. 想起往日的辛酸往事，他不禁流下了眼泪。

   xiǎng​qǐ wǎng​rì de xīn​suān wǎng​shì, tā bù​jīn liú​xià le yǎn​lèi.

   Recalling the bitter hardships of his past, he couldn't help but shed tears.

   Source: Dong Chinese Dictionary

4. 这种植物的根茎带有辛酸的味道。

   zhè zhǒng zhí​wù de gēn​jīng dài​yǒu xīn​suān de wèi​dao.

   The roots of this plant have a pungent and sour taste.

   Source: Dong Chinese Dictionary