zhè tái / lǎo shì / zhēng qì jī / yǒu / sì ge / qì gāng / měi ge / qì gāng / dōu / xū yào / dìng qī / jiǎn chá

这台老式蒸汽机有四个汽缸，每个汽缸都需要定期检查。

This old-fashioned steam engine has four cylinders, and each one needs regular inspection.