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immunity from the several serotypes, however this immunity steadily declines with old age. 来自 Cambridge English Corpus 示例中的观点不代表剑桥词典编辑、剑桥大学出版社和其许可证颁发者的观点。

At any given time when natural background was a worthwhile Software for discovery, Merian identified info about crops and Insects which were not Formerly known.

Another kinds, In fact, would be much more normally utilised for a greeting than the usual farewell, nevertheless historically that was not the situation.

It's natural for us to want enjoyment → C'est naturel pour nous de rechercher les sensations fortes.

Modern a long time have noticed a developing awareness of animal welfare and the necessity to safeguard wild canine species. Habitat decline and human encroachment pose major threats to those wild canines.

I believe a certain quantity of worry about function is rather natural, but you've got to preserve it in proportion .

c. Biology Not made or altered artificially; not conditioned: natural immunity; a natural reflex.

Throughout the proestral time period, improved levels of estradiol make the feminine desirable on the male. There is a rise check over here in progesterone in the course of the estral period when feminine is receptive. Adhering to this, the extent of estradiol fluctuates and there is a prolonged dioestrous phase during which the female is Expecting. Pseudo-pregnancy usually occurs in canids that have ovulated but failed to conceive. A duration of anestrus follows pregnancy or pseudo-pregnancy, there being just one oestral time period in the course of each breeding year.

Through background, dogs have fulfilled quite a few roles, from searching partners to faithful companions. Their adaptability has authorized them to combine into numerous facets of human lifestyle.

To Restrict the number of telescopes on Mauna Kea, previous kinds will likely be removed at the conclusion of their lifetimes and their web-sites returned to some natural condition.

"It is really nothing at all new, It is really absolutely nothing also challenging and It can be natural for the reason that lots of people have TV remotes," suggests Rodriguez.

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