英语语法分析

Shellac also happened to be an effective electrical insulator.

紫胶恰巧还是一种有效的绝缘物。

Once that happens, and it almost always does, the insect simply becomes part of the shellac-making process.

一旦出现这种情况，而且几乎总是如此，昆虫仅仅作为虫胶制作过程的一部分。

Residency training, with its harsh hours and unrelenting pace, added several more layers of protective shellac.

在住院医师训练中，时间紧凑并且伴随着无情的步伐，再加上身上手上许多层的具有保护性质的乳胶外衣和手套。