查询词典 concave slide

The research shows that gas concentration shows generally an increasing tendency along the working face airflow direction, from 0.095% to 0.18%, under the effect of gas drainage points, up-and-down changing locally; gas distribution in a transect of working face is unequal, under the effect of gas emission, ventilation and drainage, the gas concentration near coal wall is larger than that near goaf, which is a concave function distribution within a distance of 1876.5 m from the inlet of working face, after greater than 76.5m, which is a decreasing distribution from coal wall to goaf.

研究表明，该工作面瓦斯体积分数沿风流方向总体呈逐渐增加趋势，介于0.095%~0.18%之间，受瓦斯抽放点的影响，局部有起伏变化；工作面横断面瓦斯体积分数分布不均匀，受瓦斯涌出、通风和抽放的影响，靠近煤壁侧瓦斯体积分数要高于采空区侧，在距离进风口约18~76.5 m范围内为凹函数分布，大于76.5 m之后，从煤壁至采空区为单调下降函数分布。

A Galilean telescope is defined as having one convex lens and one concave lens.

阿伽利略望远镜的定义是一个凸透镜和一个凹透镜。

A concave lens causes rays to diverge as though they are coming from a focal point.

发散透镜使光线分开，就好象从焦点上发出来的那样。

Convex lens and concave lens are two tpyes of familiar lenses.

常见的透镜有凸透镜和凹透镜两种。

Taking a concave cylinder lens as example, the simulated results of developed profile before and after correction are presented, and the volume deviation of profile after correction is only 2.63%.

该方法在有效改善面形质量的同时，并没有引起掩模的设计、制作难度及费用增加，这对于设计、制作高质量的微结构元件有重要意义。

Methods Hypermetropia and myopia were induced by playing concave and convex lens in front of eyes of 32 subjects.

在正常眼前放置正、负球镜，人工诱导单纯性远视、近视性屈光参差。

An approach is proposed, which emphasizes the importance of concave lens which can scatter the laser and make it an ideal signal source to be captured by the CCD lens. Thus, the measurement would be more precise, taking full advantage of the laser.

本文提出以凹透镜散射法将待测光源转化为镜头可以直接捕捉的理想光源，从而大大提高了点的测量精度，充分利用了激光作为信号源所体现的优势。

Just as a double convex lens enlarges, so a double concave lens reduces.

正象双凸透镜可以放大那样，双凹透镜也可以缩小。

Some are flared—that is, thicker at the rim than in the center, like a concave lens.

有些呈喇叭形──即边缘较中心厚，类似凹透镜。

The participants were fifth grade students and they were divided into high score group, middle score group, and low score group according to their achievement in the learning area of science and technology. There were two learning projects in two periods of experimental instruction with different participants: the first project was concave and convex lens and the second project was the investigation of sound and create instrument.

研究对象为国小五年级学生，以学生的自然与生活科技学习成就，将学生分为高分群、中分群、低分群，进行不同研究对象的二阶段实验教学，其学习主题：第一阶段为「凹透镜与凸透镜」，第二阶段为「声音的探讨与乐器制作」。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48