难达到的

The level of China's society commercial credit is not high, the bill market growth is not mature, the operation of commercial bank accepts and discount is not standard and the rediscount market is very limited.

我国社会商业信用水平不高，资本市场成长得不够成熟，商业银行的运营难达到标准以及再贴现市场非常有限。

Constructionism theory orders a high level for teaching environment, which, can not be reached by traditional teaching method.

建构主义学习理论对教学环境提出了很高要求，传统的教学技术和手段很难达到。

It's difficult to reach your destination if you don't know where you're going!

如果你不知道要去哪里的话就很难达到你的目标。

Home thinks fire refining miscellaneous copper is very inaccessible all the time the standard of tall electric copper, special abound in in a few kinds of impurity, and when fantasticality.

国内一直认为火法精炼杂铜很难达到高导电铜的标准，非凡在几种杂质大量存在，并且变化无常时。

As we know for pancreatic cancer there is no cell line for big animal transplantation,so the experimental study for screening optimal interventional chemotherapy drug schedule is hard to perform.

但是所有这些药物都面临毒副作用大，患者耐受性差，用药剂量很难达到最佳治疗剂量，而且最重要的是有效率较低。

The calculating formula of parabola and the length of ellipse arc can be found in the old handbook of mathematics, but it is inconvenient to be used in practice, especially, the accurate value is too difficult to get to.

关于抛物线和椭圆弧长的计算公式在数学手册和有关用表中早就可见。但实际上用起来很麻烦，其精确值也较难达到。

But in real world, it is very hard to get the ideal output because of noises.

然而，在现实世界中，由于各种干扰的存在，往往很难达到理想状态。

Objectively speaking, it is difficult to attain their objectives .

客观上讲，他们的目的很难达到。

It is proposed to directly carry out the orthogonal expansion of the seismic displacement to capture main probbilistic characteristics of the seismic ground motion with only a few terms of the series.

考虑到直接对地震动加速度随机过程实施正交展开，很难达到以较少展开项数反映原随机过程的目的。

Segments of the river have been finding it difficult to meet the drinking water standard for nitrates.

一些河段已经很难达到饮用水的硝酸盐含量标准。

The big eared hedgehog, the little owl, the sand gecko, the three-toed jerboa, and every show needs a villain - saw-scale - the viper!

大耳刺猬，小猫头鹰，沙壁虎，三趾跳鼠，每场戏都需要反派角色：蝰蛇。

Plasmodiophora brassicae ; resting spores ; density gradient centrifugation of sucrose ; ultrasonic disruption

根肿；休眠孢子；蔗糖密度梯度离心；超声波破碎