web上有许多软边和硬边的例子，不过，软度变化的中间笔触很少看到。
There are plenty of examples of soft and hard edges on the web, but varying the softness mid-stroke is seen much less often.
那位妇女尽力在丈夫和儿子中间调解，但她被粗鲁地推到了一边。
The woman tried to intervene between her husband and son, but she was roughly pushed aside.
在埃及营和以色列营中间有云柱，一边黑暗，一边发光，终夜两下不得相近。
In the middle of Egypt and Israel camp cloud, dark side, side light, night two no nearer.
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