3 sentences for 抓紧 (zhuā​jǐn — grip)

1. 在公车上请抓紧扶手。

   zài gōng​chē shàng qǐng zhuā​jǐn fú​shǒu.

   Please hold the handrail tightly on the bus.

   Source: Dong Chinese Dictionary

2. 抓紧绳子，千万别松手！

   zhuā​jǐn shéng​zi, qiān​wàn bié sōng​shǒu!

   Hold onto the rope tightly, don't let go!

   Source: Dong Chinese Dictionary

3. 他双手抓紧铁杠，用力做了一个翻转动作。

   tā shuāng shǒu zhuā​jǐn tiě gàng, yòng​lì zuò le yī gè fān​zhuǎn dòng​zuò.

   He gripped the iron bar with both hands and performed a flip.

   Source: Dong Chinese Dictionary