整个清晨我想编一个花环，可是花儿滑失了。
I try to weave a wreath all the morning, but the flowers slip and they drop out.
它能在滑极之前准确预测失步，并具有构成简单和适应性强的特点，因此易于实现，是失步保护的一种实用方法。
The criterion possesses the features of simple configuration and excellent adaptability. Because of its easy implementation it is a practicable method for out-of-step protection.
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