时差N小时 熊为何在夏季觅食?(下)

Although bears mate in the spring, the fertilized¹ eggs don't begin to develop until the females return to the den² for the winter.

虽然熊在春天交配，但是受精卵直到冬天雌熊返回洞穴才开始发育。

The females must have stored up enough fat over the summer to support themselves and their developing cubs³ over the long winter.

雌熊必须在夏季储存足够的脂肪好让自己和正在发育的幼仔安然过冬。

If not enough fat is stored, the embryos⁴ won't develop at all, and the female bear won't produce any cubs that year.

如果储存的脂肪不充裕，胚胎就无法完全发育，那么这一年雌熊也不会诞下任何幼仔。

Like Yogi Bear, real bears also seek out humans who might be carrying a snack,

与约吉一样，现实中的熊也会追寻可能携带零食的人类，

and many bears look for garbage, pet food, livestock⁵, and campers for an easy supply of food.

很多熊为了觅食便利，它们会直接寻找垃圾、宠物粮、家畜和野营者来获取食物。

Contrary to popular belief, bears don't eat humans.

与大家的想法不同，其实熊并不吃人。

Unless humans surprise the bear or threaten the cubs, bears will avoid human contact.

除非受到惊吓或幼仔受到威胁，否则它们会尽量避免与人类接触。

They really are more interested in your picnic basket.

事实上，它们对你的野餐篮更感兴趣。

1 Fertilized   

v.施肥( fertilize的过去式和过去分词 )

参考例句：

• The study of psychology has recently been widely cross-fertilized by new discoveries in genetics. 心理学研究最近从遗传学的新发现中受益匪浅。
• Flowers are often fertilized by bees as they gather nectar. 花常在蜜蜂采蜜时受粉。

2 den   

n.兽穴；秘密地方；安静的小房间，私室

参考例句：

• There is a big fox den on the back hill.后山有一个很大的狐狸窝。
• The only way to catch tiger cubs is to go into tiger's den.不入虎穴焉得虎子。

3 cubs   

n.幼小的兽，不懂规矩的年轻人( cub的名词复数 )

参考例句：

• a lioness guarding her cubs 守护幼崽的母狮
• Lion cubs depend on their mother to feed them. 狮子的幼仔依靠母狮喂养。 来自《简明英汉词典》

4 embryos   

n.晶胚；胚，胚胎( embryo的名词复数 )

参考例句：

• Somatic cells of angiosperms enter a regenerative phase and behave like embryos. 被子植物体细胞进入一个生殖阶段，而且其行为象胚。 来自辞典例句
• Evolution can explain why human embryos look like gilled fishes. 进化论能够解释为什么人类的胚胎看起来象除去了内脏的鱼一样。 来自辞典例句

5 livestock   

n.家畜，牲畜

参考例句：

• Both men and livestock are flourishing.人畜两旺。
• The heavy rains and flooding killed scores of livestock.暴雨和大水淹死了许多牲口。