例句
an obligation to render assistance to those in need
为有困难的人提供援助的义务
a bill of $3,200 for services rendered
一张3,200美元服务费的账单
an obligation to render assistance to those in need
为有困难的人提供援助的义务
a bill of $3,200 for services rendered
一张3,200美元服务费的账单