2 sentences

1. 这种面料很有弹力，穿起来非常舒适。

   zhè zhǒng miàn​liào hěn yǒu tán​lì, chuān qi​lai fēi​cháng shū​shì.

   This fabric is very stretchy and very comfortable to wear.

   Source: Dong Chinese Dictionary

2. 这个篮球的弹力已经减弱了，需要充气。

   zhè​ge lán​qiú de tán​lì yǐ​jīng jiǎn​ruò le, xū​yào chōng​qì.

   The basketball has lost its bounce and needs more air.

   Source: Dong Chinese Dictionary