唧筒

tā de tuǐ tài duǎn bù shì hé sài pǎo hé kuà lán dàn què néng xiàng jī tǒng shì de shàng xià yùn dòng dài zhe tā fēi kuài de tà lěi kuài de ràng nǐ dōu lái bù jí kàn

他的腿太短，不适合赛跑和跨栏，但却能像唧筒似的上下运动，带着他飞快地踏垒，快得让你都来不及看。

The legs that are too short for track and hurdles can pump up and down, carrying him around those bases faster than you can see.

jī tǒng de zuò yòng chǎn míng le xīn zàng rú hé jiāng xuè yè sòng dào shēn tǐ de měi yī bù fen

唧筒的作用阐明了心脏如何将血液送到身体的每一部分。

The work of a pump illustrates how the heart sends blood around the body.