每个公民都有义务遵守宪法和法律。

Měi gè gōngmín dōu yǒu yìwù zūnshǒu xiànfǎ hé fǎlǜ.

Every citizen has the obligation to abide by the constitution and the law.

修改宪法是一件非常严肃而复杂的事情。

Xiūgǎi xiànfǎ shì yí jiàn fēicháng yánsù ér fùzá de shìqing.

Amending the constitution is a very serious and complex matter.

在现代社会，宪法保障了公民的言论自由和人身安全。

Zài xiàndài shèhuì, xiànfǎ bǎozhàng le gōngmín de yánlùn zìyóu hé rénshēn ānquán.

In modern society, the constitution protects citizens' freedom of speech and personal safety.