As the optical precursor and main wave packet traveled through a second group of rubidium atoms, the scientists took measurements on the speed of the two photon components.

随着光前驱和主波包通过第二组铷原子，科学家就可以对这两个光子成分的速度进行测量。

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He observed one group of children behind rocks. "I tried to wave to them and to get their attention, but I didn't get a response," he said.

他看到了教室后面有一群孩子。“我试着向他们挥手，引起他们的注意，但没有得到任何回应。”他说。

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The brain activity data collected from the volunteers in the sleep group showed that deep sleep (slow-wave sleep) helped strengthen their memories of new words.

从睡觉的那一组志愿者那里收集来的大脑活动的数据表明，深度睡眠(短波睡眠)帮助他们巩固了对词汇的记忆。

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The group says less time passes for an earthquake shock wave to reach a measuring instrument than in the past.

VOA: special.2009.03.17

so first of all, Cal Tech has a very strong group in gravitational wave physics,

首先，加州理工引力波物理的师资很强，

一见钟情的学校 - SpeakingMax英语口语达人

"Julian and I bonded over Scritti Politti, " Mr. Bing said, referring to the British New Wave group.

WSJ: Fol Chen Reveals Its Faces | By Jim Fusilli

Two of the companies in the group, New Wave Bottoms and New Wave Style were located, respectively, on the second and the 6th and 7th floors of the collapsed building.

NPR: At A Glance, Bangladesh Building Collapse

New wave group The Rubinoos toured and recorded from 1975 to 1983 and had a hit with a cover version of Tommy James and the Shondells' I Think We're Alone Now.

BBC: NEWS | Entertainment | Avril Lavigne rejects copy claim