它嗅到了我们的气味，抬起头来用它黑色的眼珠打量着我们。
He scents our presence, lifts his head, and regards us intently with black eyes.
激光能去除眼球虹膜最外层的棕色素或黑色素，而蓝眼珠会在两到三周之后显现。
The laser energy removes the brown pigment, or melanin, from the top layer of the iris, and the blue eye colour emerges over the following two to three weeks.
兽医转了转眼珠子，转过身，走出了房间，几分钟后带进来一条黑色的拉布拉多猎犬。
The vet rolled his eyes, turned around, left the room, and returned a few moments later with a black Labrador Retriever.
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