一个人如果对自己掌握的事实没有把握，就绝不该随便批评。
One should never criticize if one is not sure of one's facts.
如果你对一课没有掌握，第二天要温故这一课。
如果他没有掌握住钓鱼的精髓，必须要原谅他。
He must be forgiven if the true essence of Gentle Craft eludes his grasp.
如果你没有掌握信息，你就无法做出适当的决定。
If you don't have information, you can't make decisions properly.
如果基本句型没有掌握，是很难写出长句的。
No one can grasp clauses well without a good command of the seven sentence structures.
如果基本句型没有掌握，是很难写出长句的。
No one can grasp clauses well without a good command of the seven sentence structures.
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