纪录片展示了鲨鱼在海洋生态中的重要作用。Jìlùpiàn zhǎnshì le shāyú zài hǎiyáng shēngtài zhōng de zhòngyào zuòyòng.The documentary showed the important role sharks play in the marine ecosystem.
海里有一条鲨鱼,游泳的人都赶紧上岸了。Hǎi lǐ yǒu yī tiáo shāyú, yóuyǒng de rén dōu gǎnjǐn shàng'àn le.There was a shark in the sea, so all the swimmers hurried ashore.
孩子们在水族馆里看到了一条大鲨鱼。Háizimen zài shuǐzúguǎn lǐ kàndào le yī tiáo dà shāyú.The children saw a big shark at the aquarium.