Zhíshù Jié nà tiān, wǒmen zhòng le yìbǎi kē shùmiáo.
On Arbor Day, we planted a hundred saplings.
Zhèxiē shùmiáo xūyào dìngqí jiāoshuǐ.
These saplings need to be watered regularly.
Shùmiáo zhǎng chéng dàshù xūyào hěn duō nián.
It takes many years for a sapling to grow into a big tree.
