We were grateful for her many acts of kindness.她的多次善心之举让我们很感激。He had an unexpected attack of goodness and helped us out.他突然发善心,帮我们摆脱了困境。They did it out of the kindness of their hearts. 他们做这件事是出于善心。They volunteer out of the kindness of their hearts.他们出于善心而担任志愿者。