Meaning of lún:
轮
wheel; disk; ring; steamship
Zhège jīqì yǒu yīgè dà lúnzi.
这个机器有一个大轮子。
This machine has a big wheel.
Wǒmen zuò shàngle gǔlǎo de zhēngqì lún jìnxíng lǚxíng.
我们坐上了古老的蒸汽轮进行旅行。
We boarded the old steamship for a journey.
to take turns; to rotate
Háizimen zài cāochǎng shàng páiduì zhǔnbèi lúnliú wán yóuxì.
孩子们在操场上排队准备轮流玩游戏。
The children lined up on the playground to take turns playing games.
classifier for big round objects: disk, or recurring events: round, turn
Wǒ yǐjīng yíng le sān lún bǐsài.
我已经赢了三轮比赛。
I have already won three rounds of the competition.