2 sentences for 试验 (shì​yàn — experimental)

1. 这项技术目前还处于试验阶段。

   zhè xiàng jì​shù mù​qián hái chǔ​yú shì​yàn jiē​duàn.

   This technology is currently still in the experimental stage.

   Source: Dong Chinese Dictionary

2. 这种药物已经进入了临床试验阶段。

   zhè zhǒng yào​wù yǐ​jīng jìn​rù le lín​chuáng shì​yàn jiē​duàn.

   This drug has entered the clinical trial stage.

   Source: Dong Chinese Dictionary