The flexibility of the lens decreases with age; it is therefore common for our sight to worsen as we get older.

眼球晶状体的柔韧性随着年龄的增长而降低；因此通常是随着我们年纪的增长，我们的视力就会变差。

The flexibility of distance learning would be particularly suited to busy managers.

远程学习的灵活性尤其适合忙碌的经理们。