You're doing really well - don't lose heart now.

你做得很好 不要灰心

He appealed to his countrymen not to lose heart.

他呼吁同胞们不要灰心丧气。

Encouraged by his friends, Jack didn't lose heart and kept on trying.

在朋友们的鼓励下，杰克没有灰心，而是继续努力。

Whenever we are in trouble, we must never lose heart, but try to think of the way out.

每当我们遇到困难时，我们绝不能灰心，而是要努力想办法解决。

Some people lose heart when they come across failures while others rise to the challenge.

一些人在面对失败之时灰心丧气而另一些人则迎接这一挑战。

I'll never lose heart even if I should fail ten times.

即使失败10次，我也不灰心。