Until the recent discovery of fossilized sauropod nesting grounds, scientists were thus uncertain whether sauropods laid eggs or gave birth to live young.
因此，直到最近发现蜥脚类恐龙筑巢地的化石之前，科学家们还不能确定蜥脚类动物到底是产卵还是胎生。
Dinosaurs laid eggs like birds do.
恐龙像鸟一样下蛋。
The birds we're looking after laid eggs!
寄养在我们家的小鸟下蛋了！
Instead I have laid eggs in others' nests and let other birds to do the hatching job.
我总是在别的鸟巢里下蛋，让它们替我孵。
The custom of an Easter egg hunt began because children believed that hares laid eggs in the grass.
这个有寻找复活彩蛋的习俗，因为孩子们以为野兔在草丛里下蛋。
The old lady carefully fed the hen and the hen laid eggs from one egg every two days to one egg every day.
老太太精心喂养那只鸡，由两天下一只蛋直到每天下一只蛋。
But there was no problem, she laid eggs straight away. She adapted to it perfectly - she was very comfortable very quickly.
但没有问题，她马上就下蛋了。她适应得极好——很快地舒适下来。
One day when my mom saw that the pigeons had laid eggs again, an idea came to her mind. She substituted two fresh chicken eggs, wondering if they would hatch.
一天，妈妈看见鸽子又下蛋了，忽然灵机一动，拿了两个新鲜鸡蛋来把鸽子蛋给换了下来，看看能不能孵出小鸡来。
A major chemical spill occurred five years ago at Baker's Beach, the world's sole nesting ground for Merrick sea turtles, and prevented nearly all the eggs laid that year from hatching.
五年前，在世界上唯一的梅里克海龟的筑巢地——贝克海滩，发生了一起重大的化学物质泄漏事件，导致当年几乎所有的海龟卵无法孵化。
Free Range eggs are also laid by hens that enjoy the freedom of a hen-house, but have the added benefit of access to an outside run.
散养鸡蛋也可能是这样的母鸡下的——它们在鸡舍里享受着自由，而且有额外的福利可以在外面跑。
They are not going to put on their best performance just after they laid their eggs, because they haven't invested that much time or energy in parenting yet.
它们不会在刚下蛋后就表现出最佳状态，因为它们还没有在养育孩子上投入那么多时间或精力。
Barn eggs, sometimes called Percher, are laid by hens that have the freedom to roam a henhouse.
谷仓蛋，有时被称为Percher，是由在可以在鸡舍里自由漫步的母鸡下的蛋。
Many cultures consider unusual eggs--misshapen, empty, yolkless, shell-less, or ones with the yolk and white merged--to be laid not by hens but by roosters.
许多文明认为不同寻常的鸡蛋——畸形、空心的、没有蛋黄的、无壳的、或是蛋白蛋清混合的——是公鸡生的而不是母鸡。
Chickens hatch from the eggs, but eggs are laid by the chickens, arousing endless debate over each side of the arguments.
鸡是蛋孵出来的，但是蛋又是鸡生下来的，就这两个论点引发了无休无止的争论。
Jan Procter, a teacher, said: "We have a little outcrop in our playground and the seagull has spotted this and decided to make a nest and has laid two eggs."
教师简•普克特说：“我们学校操场上有一块突出的地儿，海鸥发现后就把巢筑在这里，它已经在这儿产了两个卵了。”
SE doesn't make the hen sick. It is also possible for eggs to become infected by Salmonella Enteritidis fecal contamination through the pores of the shells after they're laid.
沙门氏菌并没有造成母鸡生病，在鸡蛋生下来之后，有可能通过蛋壳表面的气孔被含沙门氏菌的排泄物污染。
The yellow eggs of the large white butterfly are laid in clumps on the undersides of cabbage leaves (above) and Brussels sprouts.
大白蝶黄色的卵成簇地产在卷心菜叶(上)和球芽甘蓝阴暗面。
It's caused by a fungus, Ascosphaera aggregata, that attacks bees when they are still larvae-the wormlike young that emerge from eggs that are laid by the female bee.
它是由一种真菌——霉菌——袭击蜜蜂幼虫(由雌蜂所产的卵孵化而成的蠕虫似的幼虫)导致的。
Eggs must also somehow escape having the eggs of another type of insect, parasitoids, laid inside of them.
虫卵有时候也要避免被其他昆虫的卵所寄生。
The titanosaur eggs were laid in loose sand. Scientists believe the hatchling had just emerged from its egg when the snake struck, attracted by its movements.
雷龙蛋化石是潜藏于疏松砂岩石中，科学家们认为在幼仔刚刚孵化出来时就遭受到了蛇的袭击，而他们很可能是因为受到暴风雨的袭击而被快速得被掩埋在了沙土之中。
Eggs are laid on leaf surfaces and when hatched the larvae are washed off or fall into water below.
它们将卵产在树叶表面，然后孵化的幼蛙被雨水冲刷或直接掉落到叶下面的水中。
"The total number of eggs laid per Wolbachia-infected female was 3.5 times higher than that observed in non-infected flies," says the study.
研究表明：在受感染的雌性沃尔·巴克氏体中卵的总数量高出在未受感染的果蝇中观察到的3.5倍。
Highly pathogenic avian influenza virus can be found inside and on the surface of eggs laid by infected birds.
高致病性禽流感病毒可在受感染禽鸟所下蛋的内层和表面发现。
For example, embryonic pig-nosed turtles become male or female depending on the temperature of the ground their eggs are laid in, while fully developed embryos can delay their hatching.
举例来说，处于胚胎时期的猪鼻龟会由其龟卵所埋之地的温度来决定其性别，而且已经发育完全的胚胎还能推迟它们的孵化时间。
As such they can live much longer - up to seven or eight months - and get those eggs laid at the beginning of the next spring.
这样它们就能活的长很久——大约七到八个月——到第二年春天产卵。
And you hens, how many eggs have you laid in this last year, and how many of those eggs ever hatched into chickens?
还有母鸡，你们去年共下了多少蛋？又有多少孵出了小鸡呢？
Mr. Robinson said the chickens are given special food made of corn or millet, with carefully controlled salt levels (too much salt can change the shape of the eggs or the number laid).
罗宾逊说，这些鸡群吃的是由玉米或小米制成的特殊饲料，其中的盐含量被谨慎控制（太多的盐会改变鸡蛋的形状或者鸡蛋产量）。
Miss Li smiled,“These eggs were laid about 95 million years ago.”
李小姐微笑着说：“这些蛋产于九千五百万年前。”
"I will be rich if I have duck eggs," she said.So she took in the duckling for three weeks, but he laid no eggs.
她说：“要是我有了鸭蛋，我就发财了，”因此她留这只小鸭住了3个星期，但他并没有下蛋。
"I will be rich if I have duck eggs," she said.So she took in the duckling for three weeks, but he laid no eggs.
她说：“要是我有了鸭蛋，我就发财了，”因此她留这只小鸭住了3个星期，但他并没有下蛋。
应用推荐