He looked fleetingly like a small boy caught in wrongdoing.

他看起来像一被抓住做错事顽皮男孩。

" The rocks are exposed to very high pressures and high temperatures, but only fleetingly, " McSween says.

“岩石暴露在非常高压力和高温下，但只短，”麦克斯温说。

In between, fleetingly, is the ecstasy of relief.

在两者之间，转瞬即逝，如释重负狂喜。

' I wondered fleetingly how often she thought Lily was going to stay.

’我一闪而过地想知道她多久会认为莉莉会留下来。

I wondered, fleetingly, if that was how I had looked when he'd found me.

我一闪而过地想，当他找到我时，我不这样子。

" American Cartel" delves only fleetingly into the personal stories of opioid victims and their families.

“美国卡特尔”只短地探究了阿片类药物受害者及其家故事。

For humans and other animals, most of our stem cells exist only fleetingly in embryos before they get used up to make our organs.

对于类和其他动物来说，我们大多数干细胞在胚胎中短存在，然后被用来形成我们器官。

' I called in sick, noting fleetingly that Richard Percival's cold 'I see, ' was actually more ominous than his previous blustering protests.

’我请了病假， 迅速注意到理查德·珀西瓦尔 (Richard Percival) 冷冷‘我明白了，’实际上比他之前咆哮抗议更不祥。

You hardcore SciShow News hounds know that new elements are constantly being created -- if fleetingly -- and then tested, and verified, in labs around the world.

铁杆 SciShow 新闻猎犬知道新元素不断被创造——如果稍纵即逝——然后在世界各地实验室进行测试和验证。

Researchers have been teaching Ayumu a memory task in which a random pattern of numbers appears fleetingly on a touchscreen before being covered by electronic squares.

研究员一直在教 Ayumu 一项记忆任务，其中随机数字模式会在触摸屏上短出现，然后被电子方块覆盖。

He even wondered fleetingly what would happen if he simply refused to get off, but remained stubbornly sitting there until the first of September, when it would take him back to Hogwarts.

他脑海里甚至闪过一想法，如果他不下火车，固执地坐在那里，一直等到九月一日，它再把他送回霍格沃茨，那会怎么样呢？

They walked upstairs--five flights. At the first landing they stopped and kissed; she was careful on the next landing, on the third more careful still. On the next--there were two more--she stopped half way and kissed him fleetingly good-by.

他们走上楼——五层楼。在第一次着陆时，他们停下来亲吻。她在下一次着陆时小心翼翼，在第三次着陆时更加小心。下一——还有两——她停在半路，飞快地吻了他一下。

I wondered fleetingly whether Sam's reluctance to talk about his wife mirrored my own, the knowledge that the moment you opened the box, let out even a whisper of your sadness, it would mushroom into a cloud that overwhelmed all other conversation.

我一闪而过地想， 山姆不愿谈论他妻子态度否反映了我想法，我知道当你打开盒子那一刻， 即使低声说出你悲伤，它也会像云一样迅速蔓延， 淹没所有其他谈话。