His skin had lost its luster and had a dull, leathery look, like a chicken wing left in the freezer too long.
他的皮肤已经失去了光泽，看上去有点暗淡的皮革色，像一只放在冰箱里太久的鸡翅。
2
Polyester fibers are white and can vary from luster and semi-translucent to dull and opaque depending on the amount of the lustrant added to the polymer.
聚酯纤维呈白色，它可以是有光泽的、半透明的。聚酯纤维的光泽取决于所加入光泽剂的量。
3
Oxidation of the skin causes it to appear dull. Vitamin E improves the appearance of the skin by adding color and luster to the skin.