外皮

The crust of the bread is burnt.

这块面包的外皮烤焦了。

The drug is collected in summer and autumn when the fruit turns greenish-yellow, boiled in water until the exocarp becomes grayish-white in colour, halved longitudinally, and dried in the sunn.

夏、秋绿黄时采收，置沸水中烫至外皮灰白色，对半纵剖，晒干。

Oil spotting (oleocellosis) was a prevalent physiological rind disorder of citrus fruits that was caused by the action of phytotoxic rind oils released from the oil cells in the flavedo.

摘要油斑病是发生在柑橘的一种常见的生理性病害，是由于柑橘外皮组织中溢出的橘油的光毒性造成的。