今年有三十多个国家的选手参赛。

jīnnián yǒu sānshí duō gè guójiā de xuǎnshǒu cānsài.

This year, competitors from more than thirty countries are participating.

她从小就梦想能参赛奥运会。

tā cóngxiǎo jiù mèngxiǎng néng cānsài àoyùnhuì.

She has dreamed of competing in the Olympics since she was little.

这是他第一次参赛，心里有点紧张。

zhè shì tā dì yī cì cānsài, xīnlǐ yǒudiǎn jǐnzhāng.

This is his first time competing, and he's a little nervous.