There have been great advances in telephone equipment in the last quarter of the twentieth century. For example, radio waves can be used to send telephone signals over long distances , often by satellite.

在20世纪最后的25年中,电话设备取得了长足的进步。例如,无线电波可以用来传送长途电话信号了,而且经常是通过卫星来传送的。

属类：学习英语-教材英语-高二下

The thickened mixture, itself also called napalm, burns more slowly and can be propelled more accurately and over greater distances than gasoline. When it comes in contact with surfaces, including the human body, it sticks tenaciously and continues to burn. It was developed and first used by the U.S. in World War II. Its use in the Vietnam War became highly controversial.

增稠后的混合物,也称凝固汽油。与普通汽油相比,它燃烧较慢,喷射更准也更远。当它与表面(包括人体)接触时,会牢牢地黏住并继续燃烧。第二次世界大战中,美国首先研制并使用凝固汽油。在越南战争中使用凝固汽油引起了强烈的争论。

属类：化学及生命科学-化学-

It had all occurred inside the glass paperweight, but the surface of the glass was the dome of the sky, and inside the dome everything was flooded with clear soft light in which one could see into interminable distances

这都是在那玻璃镇纸里面发生的,玻璃的表面成了苍穹,苍穹之下,什么东西都充满了柔和的清澈的光芒,一望无际。

属类：综合句库--

It is a great, demanding claim on him, something that chooses him and calls him to vast distances .

这是一个艰巨的、不可妥协的目标,用坚定的信念,向远方召唤。

属类：文学表达-外国散文-爱的低语

The components, visible as separated spots, are identified by comparing the distances they have traveled with those of the known reference materials. TLC is useful for biological mixtures, especially lipids in animal or vegetable tissues and isoprenoids and essential oils found in flowers and other parts of plants. The matrices withstand strong solvents and developers better than the paper used in paper chromatography.

这些组分分开成一些斑点,将它们移动的距离与已知的参考物作比较就可辨认出它们。此项技术用于生物混合物,尤其适用于动物或蔬菜组织中的类脂混合物、花卉和植物中的类异戊间二烯化合物和精油的分离。比起纸色层分析法来,此法中用的基质对强溶剂和显色剂有更强的承受能力。

属类：化学及生命科学-化学-

Seeds can be carried for long distances by the wind.

种子能被风传送得很远.

属类：综合句库-典型例句-

A good cyclist can cover distances of over a hundred miles a day.

自行车骑得好的人一天可以行驶一百多英里.

属类：综合句库-典型例句-

Cycling races racing include track events and road events．Track I'a13er8 compete at various distances in pursuits,time trials and sprints．

自行车赛包括场地自行车赛和公路自行车赛,场地自行车赛包括各种距离的追逐赛、计时赛和争先赛。

属类：体育娱乐-体育-自行车赛

Name,distances of the nearest rivers,lakes and seas and their records of the lowest,normal and highest levels

最近的河、湖、海的名称、距离和以往最低、一般和最高水位

属类：应用文体-单证-保险单

The earliest telephones were not popular and it took a long time before people began to hire or buy them. At the beginning it was difficult to bear people over long distances .

最早的电话并不受人欢迎,过了很长一段时间人们才开始租用或购买电话。在开始的时候很难听到远方的主讲话声音。

属类：学习英语-教材英语-高二下