to make a contribution to charity给慈善事业捐款We must make a contribution to protecting the environment.我们必须为保护环境作出贡献.We should make a contribution to keeping our school clean and tidy.我们应当为保护校园整洁、卫生做贡献....
老款的汽车难免缺少经过改进的最新安全保护装置。Older cars inevitably lack the latest safety refinements.还有改进的余地.There is still room for improvement.你的工作还有改进的余地.There's room for improvement in your work....
马的喘息症难治.Heaves is difficult to cure.我得了很难治的感冒,日夜咳嗽.I had a stubborn cold and coughed day and night.反流可引起复发的难治的吸入性肺炎.Reflux leads to recurrent or refractory aspiration pneumonia....