只有努力学习，才能取得好成绩。

Zhǐyǒu nǔlì xuéxí, cáinéng qǔdé hǎo chéngjì.

Only by studying hard can good results be obtained.

只有不断尝试，才能得到进步。

Zhǐyǒu bùduàn chángshì, cáinéng dédào jìnbù.

Only if we keep trying can we make progress.

只有坚持锻炼，才会有好的身体。

Zhǐyǒu jiānchí duànliàn, cái huì yǒu hǎo de shēntǐ.

Only by persisting with exercise can one be healthy.