他把这句话写在本子上，希望能永远记住。

Tā bǎ zhè jù huà xiě zài běnzi shàng, xīwàng néng yǒngyuǎn jìzhù.

He wrote this sentence in his notebook, hoping to remember it forever.

我希望我们永不分开。

Wǒ xīwàng wǒmen yǒng bù fēnkāi.

I hope we will never be apart.

为了保护环境，我觉得这是我们永远的责任。

Wèile bǎohù huánjìng, wǒ juéde zhè shì wǒmen yǒngyuǎn de zérèn.

In order to protect the environment, I think this is our everlasting responsibility.