difficult to ensure

Both hygiene and proper dilution are difficult to ensure.

奶粉的卫生和恰当稀释很难得到保证.

The traditional crafts process design use the manual operation, so it difficult to ensure the accuracy of the data and information share, so it has become the weak link in the product development.

传统的工艺过程设计使用手工操作方式，难以保证数据的准确性，并且信息共享困难，已成为产品开发的薄弱环节。

It is difficult to ensure control quality by using conventional PID control method due to the distinctness of the mathematic model of object with temperature programmer in different temperature reach.

由于程序升温对象在不同温区其数学模型不同，而传统的PID控制方法难以保证控制质量。

The method is often time-consuming and high-cost, but also often makes it difficult to ensure the practicality and reliability of the TWB parts, especially for the design of TWB parts based on side impact safety.

该方法往往耗时长、费用高，还往往难以保证拼焊板零件的实用性和可靠性，特别是对于考虑车辆耐撞性的车身拼焊板零件设计。

How to ensure the right of the media, and to achieve adequate protection of the legitimate rights of defendants make to be very difficult problems.

如何在保证新闻媒体的报道权的同时实现对被追诉人正当权利的充分保障成为一个难题。

Google and Apple have made it far too difficult to adjust these settings so it's up to us to take steps ensure we set these triggers to suit our own needs, not the needs of the app makers'.

谷歌和苹果公给调整这些设置增加了很多难度，所以我们决定是否自己动手来确保这些提示符合我们自已的需要，而不是符合软件开发者的需要。

Traditional processing method is difficult to ensure the curved surface precision, has the unconquerable obstacles.

传统加工方法难以保证曲面精度，存在无法克服的障碍交替传译。

Because of the lack of so-called sentencing procedures to ensure fair sentencing, is not to the parties and the social perception of the masses, the objective is difficult to truly adapt to criminal culpability.

因为缺少量刑程序保证的所谓量刑公正，是无法让双方当事人和社会群众所感知的，在客观上也难以真正做到罪责刑相适应。

Traditional dental implant navigation technology which has poor reliability is difficult to ensure the operation accuracy, while Computer Assisted Surgery ( CAS) can not suitable for practical application for small and medium hospitals and patients in our country because of high cost.

传统义牙种植定位导向技术可靠性较低，难以保证手术精度，而计算机辅助手术（CAS）成本高昂，不符合我国中小型医院和患者的应用实际。

The manual method of Jingdong Mall has been unable to optimize a large number of webpages. The quality of optimization is also difficult to ensure that has seriously hampered the improvement of website user experience.

京东商城现有的手工优化方法已经无法支撑大量页面的优化工作，优化工作的质量也难以保证，这种情况严重制约了网站用户体验的提高。

However, it is difficult to ensure the definition of ethical investment theory, such as green investment, socially responsible investment and ethics in investment behavior and other related concepts.

诚然，理论界对于伦理投资概念的界定还比较模糊，诸如绿色投资、社会责任投资以及投资伦理等相关的概念容易混淆。

The traditional control of slip frequency is scalar control, but the implementation of control systems make it difficult to ensure good dynamic characteristics.

传统的转差频率控制属于标量控制，但该方法实施控制时难以保证系统获得良好的动态特性。