1. 我六点钟出门才能赶上火车。

[ wǒ liù diǎn zhōng chū mén cái néng gǎn shàng huǒ chē 。 ]

I left at 6:00 so that I could catch the train.

2. 只有努力，才能成功。

[ zhǐ yǒu nǔ lì ， cái néng chéng gōng 。 ]

Only by working hard can we succeed in doing everything.