Some may have had undetected mild or asymptomatic reinfections.

有些人或许是未检测出的轻症或无症状再感染。

Infections in developing countries may be going undetected.

发展中国家的感染可能不会被发现。

This time they've managed to remain undetected.

这次他们终于没被发现。

These creatures are smart. They know how to go undetected.

这些禽兽真狡猾。他们知道怎么逃过侦查。

" It's just that a lot of them go undetected."

“只是大部分一直未被发现。”

A jaguar's patterns help it slink undetected across the sun-dappled rainforest floor.

美洲豹身上的斑纹让它可以在阳光斑驳的雨林地带潜行。

She was accomplishing so much, and she continued to go undetected.

她做了这么多，却一直不被发现。

In each region or country it tends to proliferate rapidly undetected.

在每个地区或国家，流行病往往迅速扩散而不被发现。

Authorities say the virus has been spreading undetected for a week.

当局表示，该病毒已经隐匿传播了一个星期。

I was surprised. How many of them could walk among us undetected?

我太吃惊了。有多少他们这样的人在我们中行走而不被察觉呢？

And you know the number one priority in the submarine is to remain undetected.

“你知道，潜水艇的首要任务就是保持隐蔽。”

While the giant is asleep, you can sneak in, count the candles and escape undetected.

趁巨人睡着的时候，你可以溜进去数一数蜡烛，然后悄悄逃走。

Some mammals, like foxes, may have been in the cities already, prowling undetected at night.

狐狸等一些哺乳动物，可能已经在城市里徘徊，只是在夜间游荡，未被人们发现。

Wouldn't be the first person to sneak undetected from a hospital-I've done it myself.

也不是没人能溜出医院而不被察觉，我就干成过。

So, while hovering, they can go undetected and concentrate on the subtle sounds of their prey.

因此，它们在盘旋时，可以不被发现，并专注于猎物细微的声音。

These vast, unexplored forests are the only places left on Earth where entire communities can live undetected.

这些广阔的、未经勘探的森林是地球上唯一一个能让整个部族安居并不被发现的地方。

Law enforcement officials say the teen jet stowaway spent 7 hours undetected before the plane's departure to Hawaii.

执法官员表示一名少年偷渡客在飞机离开夏威夷之前未被发现的时间达7个小时之久。

To communicate undetected, the group modified two radios into telephones, linked together through kilometers of barbed wire covering the countryside.

为了在不被发现的情况下进行交流，该组把收音机改成电话，通过覆盖农村的，多公里的铁丝网连接在一起。

The drone that crashed near the White House, called a DJI Phantom, caused no damage, but it flew in undetected.

于白宫附近坠毁的无人机名为“大疆幻影”，虽未造成任何破坏，问题是该无人机飞入了禁飞区都未被发现。

The exact reason for the failure is still unclear, but a previously undetected pig virus may have played a role.

失败的确切原因尚不清楚，但一种以前从未被发现的猪病毒可能起了某种作用。