When facing difficulties, don't lose heart.

面对困难时，不要丧失信心。

youdao

Yet we need not lose heart over this bad habit.

然而，我们不必对这种坏习惯丧失信心。

youdao

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。

youdao

And any argument between us would not cause me to lose heart or feel a sense of loss.

VOA: special.2010.07.11

If you ask him if it's our people're gonna go, man will lose heart because of the theme of The Magnificent Ambersons that take you leave the way.

如果你问他我们人民将何去何从，人们会灰心丧气，因为《安巴逊家族》的,主题会让你无路可走。

麻省理工公开课 - 电影哲学课程节选

If that bank says no to you, do not lose heart.

VOA: special.2010.07.18

If you had trouble accessing the IRS Web site in February or March, you shouldn't lose heart, Lindsay says.

CNN: Sci-Tech - E-filing eases way for tardy taxpayers

And there are a lot of folks who, understandably, seeing what goes on in Washington, sometimes lose heart and they get cynical.

WHITEHOUSE: Remarks by the President at a Campaign Event

However, he said that according to recent census results, 59% of people still identified themselves as Christian, and believers should not lose heart.

BBC: Archbishop Rowan Williams delivers final new year message