航空公司推荐使用硬边的提箱以求耐用。

Airlines recommend hard-sided cases for durability.

《柯林斯英汉双解大词典》

对于这个层蒙版，我不想有硬边。所以我们选画笔工具手工建立蒙版。

For this particular layer mask I don't want to create a hard edge so we are going to use the brush tool to manually create our mask.

youdao

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.

youdao