Hypersonic wind tunnels operating at very low densities were developed starting in about 1960.

The larvae densities are declining with rice growing coverage.

随着水稻的生长,遮盖度增加,幼虫密度下降.

Two side thyroid gland appearance, densities such as often.

两侧甲状腺形态 、 密度如常.

The range of densities of interest is about 3.5.

有用的密度范围为3.5左右.

Water, coal measures and salt have densities markedly different from other earth materials.

水 、 煤和盐的密度与其它介质有很大的差别.

Densities presumably can be probed by radar.

利用雷达也许还能探测出气体的密度.

Granulomatous disease by chest radiograph can appear as reticulonodular densities.

肉芽肿疾病胸片显示网点状致密阴影.

High population densities are putting enormous stress on the environment.

高密度的人口使环境难堪重荷.

Are there new states of matter at ultrahigh temperatures and densities?

超高温和密度之下是否有新的物质形态?

Finally, the positive column is reached where electrons and ions have equal densities.

最后到达的区域是正柱区,这里,电子和离子具有相等的密度.

Instead, fracture densities increase in the vicinity of faults or shear zones.

相反, 裂缝密度在断层和剪切带附近增加.

In this definition, the contrast is given by the ratio of two light densities.

对比度定义为两个光密度之比.

Meteorology The interface between air masses of different temperatures or densities.

[气象学]锋面:不同温度、密度的两大气团交界处.

The reading aperture of a densitometer refers to the size ofthe spot it will measure.

浓度计的读书开口提到大小它将测量的斑点.

Densitometer: An optical instrument used to measure the intensity of transmitted or reflected light.

密度计: 用来量度透射或反射光的强度的一种光学仪器.

Densitometer is an apparatus used for measuring photosensitivity of films.

光学密度计是一种测量胶片感光性能的专用仪器.

The setup densitometer lamp must be replaced.

设定用浓度计的灯泡必须更换.

The zero point of the density scale is defined by having no specimen in the densitometer.

定义密度计内设有样品时的密度为密度尺标的零点.

Mass flow information can be secured by using a densitometer.

质量流量的数据可借助于密度计而获得.

The zero point of the density scale is defined by having no specimen densitometer.

内设有样品时的密度为密度尺标的零点.

The setup densitometer lamp is too weak. Prepare for replacement.

设定用浓度计的灯泡已太弱, 准备更换.