阶梯

The new technique reduced the distance ladder to three "rungs":(1) The distance to galaxy NGC4258 is measured using straightforward geometry and Kepler's laws;(2)Cepheids in six more distant galaxies are used to calibrate the luminosity of Type Ia supernovae;(3) The Hubble constant is measured by observing a brighter milepost marker, Type Ia supernovae, in more distant galaxies hundreds of millions of light-years away, embedded in the expanding universe.

这种新技巧简化了距离跳跃为三个"阶梯"：1、星系NGC 4258的距离采用开普勒定律和简单直接的几何方法精确测量；2、在6个更远的星系中的造父变星用来校准Ia超新星的光度；3、深嵌于数亿光年外的膨胀宇宙中的星系中的Ia超新星——一种遥远而明亮的量天尺，被用于精确测定哈勃常数。

It is however a form of killing with fervour and delight, a social occasion when 'one does, doesn't one' if you are well placed on the social ladder.

但是，某种形式的杀戮与热情和愉快的社交场合时，一个没有，没有一个'如果你有能力对社会的阶梯。

Ladder stitch and how it ...

阶梯缝以及如何。。。

The Hiroshima Fire Department lost its only ladder truck when its West Side main fire station was destroyed by the blast and fire of the atomic bomb, 1,200 m (4,000 ft) from ground zero.

广岛消防部门失去了唯一的阶梯卡车西口时，其主要消防局炸毁和消防原子弹，一二零零米（ 4，000英尺）从地面为零。

Each of us must have ideals, it is to guide us in the ladder of success.

我们每个人都要有理想，它是指引我们成功的阶梯。

There is a ladder you're seeking.

这是你一直寻找的阶梯。

Book is a ladder of human progress.

书是人类进步的阶梯。

You should be proud of your achievements,because they are the ladder to the dream.

为自己的成绩自豪，因为它们是你通往梦想的阶梯。

The book is the ladder of human progress.

书是人类进步的阶梯。

Book is the ocean of knowledge is the ladder of human progress.

书是知识的海洋，是人类进步的阶梯。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。