使用恰当的材料至关重要。The use of the correct materials was crucial.如果缺少恰当的后续行动，该项目可能失败。The project could fail if there is inadequate follow-through.他这番话对讨论作了恰当的总结。What he said was a fair summation of the discussion....
He used his left hand as a shield against the reflecting sunlight.他用左手挡住反射过来的阳光。The gunman used the hostages as a human shield .持枪歹徒用人质作人体盾牌。The knight carried a shield with a cross painted thereupon.骑士拿着绘着十字的盾牌....