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25.牙周膜的正常厚度为
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26.穿通纤维是
30.牙周膜中不含
We cannot travel every path. Success must be won along one line. We must make our business the one life purpose to which every other must be ___________. I hate a thing done by halves. If it be right, do it boldly. If it be wrong, leave it undone. The men of history were not perpetually looking into the mirror to make sure of their own size. _________ in their work they did it.
They did it so well that the wondering world sees them to be great, and ________ them accordingly. To live with a high ideal is a successful life. It is not what one does, but what one tries to do, that makes a man strong. “Eternal vigilance,” it has been said, “is the price of ________.” With equal truth it may be said, “Unceasing effort is the price of success.”
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