瞎抓

tā fù xí shí hou bù dé yào lǐng xiā zhuā yī qì

他复习时候不得要领，瞎抓一气。

Without a methodical approach, he went about the revision in a haphazard manner.

qǐng shì xiān zhǔn bèi jiù xù miǎn de dào shí xiā zhuā

请事先准备就绪，免得到时瞎抓。

Get everything ready beforehand so that you won't make mistaken moves.

zǒng xiā zhuā luàn pèng

总瞎抓乱碰

always go about one's work blindly and haphazardly

shì xiān bǎ yào dài de dōng xī dōu zhǔn bèi hǎo yǐ miǎn lín shí xiā zhuā

事先把要带的东西都准备好，以免临时瞎抓。

Get everything ready beforehand so that you won't be in a rush when it's time to leave.