persist insist 释义：
坚持坚持
例句：
The simplest thing is to persist， the most difficult thing is to insist on.
最简单的事是坚持，最难的事还是坚持。
preserve释义：
vt. 保存保护维持腌禁猎
n. 保护区禁猎地（某人或群体的）专门活动果酱蜜饯腌菜
例句：
He would rather pay a huge fine to preserve his reputation.
他宁愿支付巨额的赔偿来维护自己的名声。
词组：
preserve food保藏食物
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