2007-12-18, Planet Carnivore: Sharks

This morning the jackass penguins¹ are out early. This species is unique to Africa, but they are insulated like other penguins. Trapped in winter wear all year long, they get hot easily. And make their way to the water before the sun is high over head. Dawn is when fish are closer to the sea surface, and when young male seal was maybe hunting. The early hours are when great white sharks hunt for seals. So far this robs stay beyond High's lethal² reach. Today he is content to bask³ in the sun. High is still circling the island. She has managed only snacks for close to 2 weeks, and wants to catch a large seal off guard.

Great white sharks can be very patient, and High's great size suggests that she is also skilled. Even with her deadly design, high prefers to ambush⁴ her victims. She locates one by using the millions of scent⁵ cells around her nostrils⁶, then tiny jelly-filled conductors on her snout, allow her to pinpoint⁷ her living target by sensing its electrical field. Once she is close enough to actually see what's she's stalking, she sinks far below her unsuspecting prey⁸. Grown great whites are cleverly counter-shaded from dark grey to creamy white. Seen from beneath, they disappear into the bright surface. From above, they fade into the darker depth. The morning sun enhances the seal's silhouette⁹, and the undersea gloom reduces her own. She doesn't stay near the bottom very long.

1 penguins   

n.企鹅( penguin的名词复数 )

参考例句：

• Why can penguins live in cold environment? 为什么企鹅能生活在寒冷的环境中？ 来自《简明英汉词典》
• Whales, seals, penguins, and turtles have flippers. 鲸、海豹，企鹅和海龟均有鳍形肢。 来自《现代英汉综合大词典》

2 lethal   

adj.致死的；毁灭性的

参考例句：

• A hammer can be a lethal weapon.铁锤可以是致命的武器。
• She took a lethal amount of poison and died.她服了致命剂量的毒药死了。

3 bask   

vt.取暖，晒太阳，沐浴于

参考例句：

• Turtles like to bask in the sun.海龟喜欢曝于阳光中。
• In winter afternoons,he likes to bask in the sun in his courtyard.冬日的午后，他喜欢坐在院子晒太阳。

4 ambush   

n.埋伏(地点)；伏兵；v.埋伏；伏击

参考例句：

• Our soldiers lay in ambush in the jungle for the enemy.我方战士埋伏在丛林中等待敌人。
• Four men led by a sergeant lay in ambush at the crossroads.由一名中士率领的四名士兵埋伏在十字路口。

5 scent   

n.气味，香味，香水，线索，嗅觉；v.嗅，发觉

参考例句：

• The air was filled with the scent of lilac.空气中弥漫着丁香花的芬芳。
• The flowers give off a heady scent at night.这些花晚上散发出醉人的芳香。

6 nostrils   

鼻孔( nostril的名词复数 )

参考例句：

• Her nostrils flared with anger. 她气得两个鼻孔都鼓了起来。
• The horse dilated its nostrils. 马张大鼻孔。

7 pinpoint   

vt.准确地确定；用针标出…的精确位置

参考例句：

• It is difficult to pinpoint when water problems of the modern age began.很难准确地指出，现代用水的问题是什么时候出现的。
• I could pinpoint his precise location on a map.我能在地图上指明他的准确位置。

8 prey   

n.被掠食者，牺牲者，掠食；v.捕食，掠夺，折磨

参考例句：

• Stronger animals prey on weaker ones.弱肉强食。
• The lion was hunting for its prey.狮子在寻找猎物。

9 silhouette   

n.黑色半身侧面影，影子，轮廓；v.描绘成侧面影，照出影子来，仅仅显出轮廓

参考例句：

• I could see its black silhouette against the evening sky.我能看到夜幕下它黑色的轮廓。
• I could see the silhouette of the woman in the pickup.我可以见到小卡车的女人黑色半身侧面影。