使用了 if 引导的条件状语从句作为插入语，增强了句子的语气。
Even an impossible task, if attempted boldly, can lead to success.
Don't wait for opportunities; create them.
It is through the grinding of the ocean that pebbles become beautiful and smooth.
Spending an extra ten minutes preparing for your lessons will make you much more relaxed in class.
As long as there is sweetness to be harvested, bees will be busy even among the thorns.
Never give up when facing difficulties; remember, perseverance is victory.
A climber aiming for the summit will not be distracted by footprints along the way.
A person who can think is truly a person of boundless power.
本来无望的事，大胆尝试，往往能成功。
不要等待机会，而要创造机会。
经过大海的一番磨砺，卵石才变得更加美丽光滑。
你多花十分钟预习功课，在课堂上就会轻松多了。
只要能收获甜蜜，荆棘丛中也会有蜜蜂忙碌的身影。
遇到困难时不要放弃，要记住，坚持到底就是胜利。
志在峰巅的攀登者，不会陶醉在沿途的某个脚印之中。
一个能思考的人，才真是一个力量无边的人。