通信

tōng xìn

to correspond (by letter etc), to communicate, communication

我有信心通过这次考试

wǒ yǒu xìn xīn tōng guò zhè cì kǎo shì

I am confident to pass this exam

我把信交给了信使。

wǒ bǎ xìn jiāo gěi le xìn shǐ。

I gave the letter to the messenger.

我不喜欢交通

wǒ bù xǐ huan jiāo tōng

I don't like traffic

请遵守交通法规。

qǐng zūn shǒu jiāo tōng fǎ guī。

Please obey traffic laws.

我相信你。

wǒ xiāng xìn nǐ。

I trust you.

我终于通过了考试

wǒ zhōng yú tōng guò lè kǎo shì

finally I passed the exam

我正在学习普通话

wǒ zhèng zài xué xí pǔ tōng huà

I am learning mandarin

最终你通过了考试。

zuì zhōng nǐ tōng guò le kǎo shì。

Eventually you pass the exam.

这里的交通不太好

zhè lǐ de jiāo tōng bù tài hǎo

The traffic here is not very good

我不想写信

wǒ bù xiǎng xiě xìn

I don't want to write a letter