斯皮策的科学家们说，核状星云中较大颗粒的存在暗示，星云已有相当的年纪，而且它拥有很多快速形成的行星。
The presence of bigger grains in a core cloud, Spitzer scientists say, suggests the cloud is relatively old and that it hosts faster-forming planets.
9月24日发布的斯皮策空间望远镜短红外波图像里，星光在黑暗的核状云中(中间图片)闪耀开来，这片星云处在更巨大的星云里，该星云被称作L183。
Starlight bounces off a normally dark, interstellar core cloud (center) inside a larger cloud called L183 in a short-infrared-wavelength Spitzer Space Telescope image released on September 24.
当我们渴望一些东西，比如说食物，水，或者药品，其他可以得到的东西，大脑深处的两个地方，腹侧表皮和尾核状体就会活动。
When we're craving things like food, water, or drugs, or anticipating getting them, two areas deep within the brain, the ventral tegmental area and caudate nucleus, are active.
研究了铝合金点焊过程中声音信号的时频域能量分布，并应用它来识别点焊的熔核状态。
This paper investigates energy distribution of air-borne acoustic signals in time-frequency domain during aluminum alloys spot welding in order to identify weld nugget states.
研究了铝合金点焊过程中声音信号的时频域能量分布，并应用它来识别点焊的熔核状态。
This paper investigates energy distribution of air-borne acoustic signals in time-frequency domain during aluminum alloys spot welding in order to identify weld nugget states.
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