The emission nebula is found near the edge of an otherwise dark large molecular cloud in the southern constellation Ara, about 4, 000 light-years away.

这个发射星云在南天星座天坛座另一个巨大的暗分子云的边缘被发现，离我们约4000光年。

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The band edge emission was observed in the PL spectra at room temperature. Its intensity was related to quality of the crystal.

在室温下的PL测量中见到了带边发射，其强度与晶体质量有关。

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The second atomic species has a characteristic emission peak that substantially matches the absorption edge of the detector.

第二原子种类具有实质上匹配检测器的吸收边沿的特征发射峰值。

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Its cutting-edge technology ensures that the B-Class Electric Drive is not only sustainable (because it offers local emission-free driving) and agile (because of its high torque and acceleration), but also fully networked.

ENGADGET: Mercedes-Benz introduces B-Class Electric Drive, we go eyes-on