用以

lüè jǔ jī gè lì zi yòng yǐ shuō míng zhè ge yuán lǐ

略举几个例子，用以说明这个原理。

Here are few examples to illustrate this principle.

tā diǎn dàng le jīn shǒu biǎo yòng yǐ jiāo zū

她典当了金手表用以交租。

She pawned his gold watch to pay the rent.

wǒ wā zào shuǐ chí yòng yǐ jiāo guàn nèn xiǎo de shù mù

我挖造水池，用以浇灌嫩小的树木。

I made reservoirs to water groves of flourishing trees.