Seventeen-year cicadas are about to invade the East Coast17年蝉就要入侵东海岸了In many places around the United States, summer just wouldn’t be the same without the occasional hum of a cicada buzzing off the in the distance.

The noisy insects are either a harmless curiosity or a total nuisance depending on what area of the country you live in and the specific species of cicada that reside there.

Folks in Virginia, North Carolina and West Virginia will see far more of the bugs than usual in 2020.

在美国的许多地方，如果没有远处偶尔传来的蝉鸣，夏天就不一样了。

这种吵闹的昆虫是一种无害的好奇物，还是完全的讨厌物，这取决于你所居住的国家的地区和栖息在那里的特定种类的蝉。

到2020年，维吉尼亚州、北卡罗来纳州和西弗吉尼亚州的人们将会比以往看到更多的昆虫。

Species of periodical cicadas maintain long brood cycles, only emerging every 13 or 17 years.

There are over a dozen of these types of cicada broods, and Brood IX hasn’t been seen since 2003.

That means it’s going to be a very noisy summer for the counties where the bugs are destined to appear.

蝉种的发育期较长，每13 ~ 17年才出现一次。

这种类型的蝉有十多种，而第九种自2003年以来就没有出现过。

这意味着，对于那些注定要出现臭虫的县来说，今年夏天将是一个非常吵闹的夏天。

These types of cicadas live beneath forest floors for years and years, gaining sustenance from tree roots.

Then, as if conjured by some invisible force, the insects crawl out of the ground in huge numbers to perch on tree trunks and limbs in the spring, where they transition to the last stage of their life cycle.

这些蝉在森林地面下生活了很多年，从树根中获取食物。

然后，仿佛受到某种无形的力量的召唤，这些昆虫成群地从地下爬出来，在春天栖息在树干和树枝上，在那里它们过渡到生命周期的最后阶段。

Adult cicadas crawl out of their flaky shells with newly-formed wings.

They spend the next month or so, and the males make a whole bunch of noise in an attempt to pair up with a female.

Their adult lives are brief, and by the start of summer, the vast majority have already reproduced and died.

成年蝉用新长出的翅膀从它们鳞片状的壳里爬出来。

接下来的一个月左右，雄性会发出一大堆噪音，试图与雌性配对。

它们的成年期很短，到初夏的时候，绝大多数已经繁殖并死亡。

Eggs, typically attached to tree limbs, hatch a couple of months later.

The baby cicadas, called nymphs, burrow down into the ground and the whole process begins again.

蝉卵通常附着在树枝上，几个月后孵化。

被称为若虫的小蝉在地下挖洞，整个过程又开始了。

Not all cicadas are periodical, but the broods that emerge simultaneously on regular 13- or 17-year cycles can be a nuisance due to their large numbers.

If you’re not a fan of the bugs, the good news is that they only hang around for a short while, and since we’re all sheltering in place due to the current global health crisis, they’ll probably be gone by the time we’re allowed to enjoy the summer weather anyway.

并非所有的蝉都是周期性的，但由于数量庞大，在13或17年的周期内同时出现的蝉种可能会令人讨厌。

如果你不是虫子的粉丝，好消息是它们只会逗留一小段时间，而且由于目前的全球健康危机，我们都在原地隔离，等我们享受夏日的时候，它们可能已经消失了。

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