Parents do everything for their children without complaining. Their children should thank them and grow up to be useful people.
 do something for somebody without complaining go through hardships without complaining白話的翻出即可.
父母為了小孩任勞任怨, 小孩應該感謝同時做個有用的人.< >
Do you think this married man has ulterior moties when he offered to drive a female colleague home?