Every year before the U.S. flu season starts in the fall, scientists develop a vaccine based on whatever strains of the flu they expect will circulate.

每年流感在美国秋天爆发之前，科学家就会根据今年可能爆发的流感种类研究相应的疫苗。

Mercado's son, now 7, wasn't aware of the town's Halloween kerfuffle when he wrote a letter to his penpal earlier in the fall.

梅尔卡多的儿子今年7岁，在秋天早些时候给笔友写信时，他并不知道镇上的万圣节骚乱。

He said that electric vehicle products took about 1950 square meters of marketing space at SEMA's yearly show in Las Vegas this fall.

他说，今年秋天在拉斯维加斯举行的SEMA年上，电动汽产品占据了约1950平方米的营销空间。

In the fall of 2015, when many of you started as undergraduates here at Michigan, our world was a different place.

在2015年秋天，当多数人都开始在密歇根大学进修本科学位时，那时的世界还是另一番模样。

So New York's theater owners are instead going to reopen in the fall.

所以纽约的剧院老板们打算在秋天重新开门营业。

For northern Australia, the peak bushfire period is during the dry season, which is generally throughout winter and spring;and for southern Australia, the bushfire season peaks in summer and autumn.

对于澳大利亚北区，森林大火高发期在旱季，旱季贯穿冬天和春天；对于澳大利亚区，森林大火的高发期在夏天和秋天。

While chlorophyll is there, it's there and it's green, while if taken away in the shorter days and shorter months of autumn, now you're releasing some of the true colors back to the surface.

当叶绿素存在的时候，叶子就是绿色的，而如果在秋天白天较短的时候消失，树叶一些真实的颜色就回到了表面。

He was arrested in Chicago, Illinois in the fall of last year, and found guilty of breaking trade laws concerning Iran, that country says Soleimani had not committed any crime.

他于去年秋天在伊利诺伊州的芝加哥被捕，并被判违反有关伊朗的贸易法。伊朗表示 Massoud 没有承认任何罪行。

A relative of jays and crows, nutcrackers hide pine seeds in theground each autumn so they have a source of food during the Colorado Rocky Mountain winter.

星鸟属于松鸟和乌鸦的近亲，它在秋天的时候把松子藏在底下，这样寒冷冬天的就有食物吃了。

Leaves fall down from trees in autumn.

在秋天，很多叶子都从树上飘落。

It's fall, ya'll at least it is in the Northern Hemisphere.

现在是秋天了，至少在北半球是秋天。

Those who want to keep the time changes support the later daylight hours in the summer and say that falling back in autumn keeps the time of sunrise closer to the time when people wake up.

而那些希望更改时间的人支持夏天延长白天，并说在秋天调回时间能使日出时间更接近人们醒来的时间。

There's no reason why they can't vote in person this fall.

他们绝对能在今年秋天到现场进行投票。

That being said, the American people face important decision this fall.

不过说真的，美国人民在今年秋天面临着一个重要的决定。

New guidelines from the U.S Centers for Disease Control strongly favor reopening schools this fall.

美国疾病防治中心的新指导方针强烈建议学校在今年秋天重新开学。

This is how lawyer Benjamin Noren, from one New York City law firm, was greeted by Madison Square Garden staff while trying to attend an event in the fall.

这就是这名来自纽约一家法律公司的律师如何，在秋天参加一个活动时，被麦迪逊广场花园工作人员认出的。

They can be at their worst in the Fall and what makes them so dangerous during wildfires is that they can both fan the flames and blow sparks to new areas causing the fires to spread.

它们可能在秋天最厉害，它们在野火形成过程中非常危险，因为它们既能煽起火焰，又能把火花喷到新的区域，导致火势蔓延。

During the autumn the mountain top is always covered in mist.

在秋天，山顶总是被雾所笼罩。

Fall in the United States is a lively time.

秋天在美国是一个热闹的时节。

Many harvest festivals are in the fall.

而许多丰收节日都在秋天举行。