机会就是可以做某件事的好时机，比如学习新东西或交新朋友的时候。
jī huì jiù shì kě yǐ zuò mǒu jiàn shì de hǎo shí jī, bǐ rú xué xí xīn dōng xī huò jiāo xīn péng yǒu de shí hòu.
An opportunity is a good time to do something, like when you can learn something new or make a new friend.
当你可以做一件对你有好处的事情时，这就是一个机会。它常常出现在学习、比赛或交朋友的时候。
Dāng nǐ kěyǐ zuò yī jiàn duì nǐ yǒu hǎochù de shìqíng shí, zhè jiùshì yīgè jīhuì. Tā chángcháng chūxiàn zài xuéxí, bǐsài huò jiāo péngyǒu de shíhou.
This word is used when a good moment or situation comes up that can help you do something positive, like learning, joining a contest, or making friends.
时机 focuses on the right time, while 机会 is a chance or opportunity.
运气 is luck, which can sometimes bring an 机会 (opportunity).