Definition: to stop believing that you can succeed Level: C2
尽管遇到挫折，不要灰心；成功往往在坚持之后到来。
Despite the setbacks, don't ___lose ___heart; success often comes after persistence.
我们必须学会克服障碍，永不丧失信心。
We must learn to overcome obstacles and never ___lose ___heart.
在多次被拒绝后，他开始灰心并考虑放弃。
After repeated rejections, he began to ___lose ___heart and consider giving up.
