灰星是手机游戏《血族》中的一张卡牌。
水产动物下脚料如皮、骨、鳍等含丰富的胶原蛋白。本文研究了灰星鲨鱼皮、骨胶原蛋白的提取及纯化方法。
A large amount of collagen exists in the wastes of aquatic animals such as in fish skin, bone and fin.
成千上万的人聚集在英国首都周围的“粉丝区”，通过大屏幕观看庆祝活动，他们的热情几乎减少了天空的灰蒙和零星阵雨。
Tens of thousands more congregated in "fan zones" around the British capital to watch the festivities on big screens, their enthusiasm hardly diminished by overcast sky and sporadic showers.
当晚，我们头顶着南十字星徒步旅行，看到五、六只大灰袋鼠以树丛为食。
On our night walkabout underneath the Southern Cross, we saw a half-dozen big gray kangaroos feeding on brush.
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