adj.出自内心的；自愿的；情愿的；慷慨的

She accepted their help without a grudge.
她欣然接受他们的帮助，毫无怨言。
He was ungrudging in his praise for the team's performance.
他对团队的表现给予了毫不吝啬的赞扬。
Despite the long hours, she approached her work with an ungrudging attitude.
尽管工作时间很长，但她对待工作的态度始终是心甘情愿的。
His generosity towards friends knew no bounds, and he was never ungrudging with his time or resources.
他对朋友的慷慨无边，从不吝惜他的时间和资源。
The elder sister offered her assistance to her younger sibling with an ungrudging heart.
姐姐心甘情愿地向妹妹伸出援手。
They were ungrudging in their support for the local charity, donating regularly.
他们对本地慈善机构的支持毫不保留，经常捐款。
His ungrudging acceptance of constructive criticism showed his maturity.
他欣然接受建设性批评的态度显示了他的成熟。
The teacher's ungrudging dedication to her students inspired them to strive harder.
老师对学生无私的奉献精神激发了他们更加努力学习。
The volunteers worked tirelessly, their ungrudging commitment making the event a success.
志愿者们不知疲倦地工作，他们无私的奉献使得活动大获成功。
Even in the face of adversity, his ungrudging optimism never wavered.
即使面对困难，他的乐观态度也从未动摇。