1815年后，这种古老的生产方式开始让位于那些由无技能或半熟练工人操作机器的工厂。

After 1815 this older form of manufacturing began to give way to factories with machinery tended by unskilled or semiskilled laborers.

youdao

蛛网膜是由无血管的结缔组织所构成。

The arachnoid is composed of connective tissue devoid of blood vessels.

youdao

你们有个三角物体，它们由无质量棒相接。

So you have three point masses, and they are connected with massless rods.

youdao

It's a poem structured around the interaction between human beings and an entire pantheon of pagan deities.

是由人类相互影响,和所有无宗教信仰的万神殿来组织语言的。

耶鲁公开课 - 弥尔顿课程节选

First there was the observation by Michelson who back in the late 1880s had done very precise interferal metric measurements of the hydrogen lines and had observed that the 656 nanometer line 3 associated with the transition of n equals 3 to n equals 2 was, in fact, a doublet.

首先是麦克逊,在1880年底的观察,他以公制单位对氢原子的光谱线,作了准确的，无其他因素干扰的，测量,发现当n值由3变为2时,会同时得到波长为656纳米的谱线3,实际上是有两条线。

麻省理工公开课 - 固态化学导论课程节选