难

The first one is that the Chinese edition of Elements was very difficult to read, and the second one is the idea that all western knowledge originated from China belittle the axiomatic method, the third one is that no logic knowledge came with it then.

从当时的实际出发，我们认为这主要有三个原因：一、《几何原本》生涩难读；二、"西学中源"说轻视西方科学；三、公理化方法传来的时候本身不完整。

It is related to the rotation axis of earth.

你的问题又多又难啊。

This paper discussed the algorithm of horizontal obligue axonometric projection of shade and shadow on spheric surfaces in light ray and projection directions.

对于任意方向的光线，作图很难完成。本文给出了任定投影方向，任定光线方向，圆球及其阴影的水平斜轴测投影的算法。

Extractive distillation is defined as distillation in the presence of a miscible, high boiling, relatively non-volatile component, the solvent, that forms no azeotrope with the other components in the mixture.

淬取蒸馏的定义为：有易混合的、高沸的、相对难挥发的组分和溶剂存在下的蒸馏，且这些组分和溶剂不与混合物中的其它组分形成恒沸物。

Objective To observe the clinical efficacy of combined therapy of Shehuang Paste with colonic dialysis in treating patients with refractory cirrhotic ascites complicated with azotemia.

目的观察麝黄膏敷脐配合中药结肠透析治疗难治性肝硬化腹水合并氮质血症临床疗效。

B : That's a difficult question.

这是个很难回答的问题。

At present, the behavioral finance theory stays in its babyhood for lack of mature financial models and analyses of real market data.

但行为金融学的理论还处于初级发展阶段，很难对其建模和进行实际数据分析。

He shares the rental house with his older brother, Eitan, and the evidence of bachelorhood is in full display.

"他正在逐渐认识到这个联盟比他想象的要难打些许，他必须要做出一些调整。"

ROGER FEDERER: After getting the second break back when I leveled the score, I knew it was going to be a tough one for him now.

当我在第一盘取得第二个破发，扳平比分的时候，我知道对他来说这场比赛会变得很难。

First of all, know this, anyone can play in the backfield, but to be a GOOD back player is probably one of the hardest things in paintball.

首先， 你必须知道，任何人都可以做后卫，但是要成为一个好的后卫很可能是漆弹里最难做到的事之一。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。