“需要不断努力”例句

单词 需要不断努力 例句 DEFINITIVE EXAMPLES 权威例句〔par〕It's a constant struggle to try to keep them up to par.要让他们达标, 需要不断努力。外研社新世纪〔par〕It's a constant struggle to try to keep them up to par.要让他们达标，需要不断努力。柯林斯高阶...