伤口上的痂会自然脱落，不要用手去抠。

The ___scab will fall off naturally, so don't pick at it.

罢工期间继续工作的工人被同事们称为工贼。

Workers who kept working during the strike were called ___scabs by their colleagues.

桃子树上的疮痂病导致果实表面出现褐色斑点。

The peach trees developed ___scab, causing brown spots on the fruit surfaces.