Lesson 63～64
    1.certainly ad. 1.一定，必定2.當然，可以
    he'll certainly 他一定會
    例句：If the director finds out that you haven't repaired the machines as yet, he'll certainly make the fur fly.
    如果主任發(fā)現(xiàn)你還沒把機器修好，他一定會大吵大鬧。