Yet man is born to trouble as surely as sparks fly upward.
人生在世必遇患难、如同火星飞腾。
It symbolizes sacrifice of the self in order to fly upward.
它代表着自我奉献，以达到自由飞升。
In that situation, we have to fight back as the sparks fly upward.
在那种情况下，我们自然要进行还击。
The airplane must be guided, is driving, so that it not only go left or right, but also can fly upward or downward.
飞机必须被制导，即被驾驶，使它不仅可向左或向右而且也可向上或向下飞行。
The airplane must be guided, is driving, so that it not only go left or right, but also can fly upward or downward.
飞机必须被制导，即被驾驶，使它不仅可向左或向右而且也可向上或向下飞行。
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