He then stayed at home to cut firewood, herd cattle and do farm work.

They use animals to do farm work.

他们使用动物干农活.

The old farmer taught them how to do farm work.

老农民教他们怎样干农活.

A farmer he was, but unwilling to do farm work.

自己是农民却不愿意从事农业劳动.

He trained the horse to do farm work.

他训练马去干农活.

Through adopting copy image ability task of geometry figure, reproductive image ability task of geometry figure and anticipatory image ability task of geometry figure, we do experiment research, to the occurrence and development of children's image ability of geometry figure.

我们采用几何图形复写表象能力作业、几何图形再现表象能力作业和几何图形预见表象能力作业对2～6岁儿童几何图形表象能力的发生与发展进行了实验研究。

Experimental study can bring many useful information. However, it cost a lot of resources to do experiment.

实船实验研究可以得到许多有用的信息，但实船实验需要耗费大量的资源。

According to the physiological and psychological features of the junior middle school students, the focal point to train and develop their subject ability during the physics teaching is to observe their abilities to do experiment, think and practice.

根据初中学生的生理、心理特点，在物理教学过程中培养与发展初中生的学科能力，重点是观察实验能力、思维能力和实践能力。

To investigate and bring up healthy psychology of the students who would like to do experiment. In This study, we evaluate the experimental effect by students behavior observation on the spot, experimental teaching video analysis, experimental test and investigation questionnaire.

研究和培养学生喜爱实验的健康心理本研究采用学生行为表现现场观测、实验教学录像分析与实验测验、调查问卷相结合的方法评价实验效果。

This paper analyses the affected factors of convection coefficient by using dimension analytical method, and simplify the formula, which guides and advises how to do experiment.

本文应用因次分析法分析了塔式烘干机中放热系数的影响因素，建立并简化了理论公式，用于指导试验设计；

Developing the students' ability to do experiment independently

培养学生自主实验的能力

To build small watershed model is an effective way to do experiment in all kinds of small drainage areas.

修建小流域模型，是对小流域进行各种试验研究的有效手段。

At the same time with instrument do experiment on site testing, do error analysis to test result, bring forward resolve method and measure.

同时对测试仪器进行了现场测试实验，并对测试结果进行了误差分析，提出了解决的方法和措施。

Connected with large scale digital display system, many a one can do experiment simultaneously.

配合大型数码显示装置，可供上百人进行实验。

Expanding to study the contents and exciting to study the interest and establishing science investigate way are the ways that students do experiment and positive considers. And improving teacher's qualities is a successful key of elicitation method of teaching.

扩展学习内容、激发学习兴趣、建立科学考核方式是启发学生深入实验过程、积极思考的途径，重视教学研究、提高教师素质是成功运用启发式教学法的关键。

This text aims at the reform of digital signal processing teaching that employs the software MATLAB. The establishment of web-based virtual laboratory on digital signal processing can satisfy the students' need to do experiment and overcome the shortage of experiments equipment.

针对目前数字信号处理教学改革中采用MATLAB进行辅助教学的现状，建立数字信号处理虚拟实验室，以适应教学改革及网络发展的需要，解决学生随时随地进行实验及学校设备不足的问题。

Physics is empirical science, it depends on the instrument to do experiment, so in order to understand the development of physics better, we need further investigation on experimental apparatus.

物理学毕竟是经验科学，必须用仪器来做实验，不深入考察仪器，就不能很好地理解物理学的发展。

At the last, we debug the circuit and do experiment to approve the rationality of the design.

最后在完成设计后进行了调试和实验以证明系统设计的合理性。

Finally, do experiment through a variety of common attacks such as compression 、 sheared 、 noise and filter, a conclusion can be made that the proposed technique is practical.

最后，通过多种常见攻击方式（如压缩攻击，剪切攻击，噪声攻击及滤波攻击等等）进行攻击实验，并用实验证明了这些方法的有效性。

Then we do experiment in the 3D hover with the real-time control software WinCon, the effect is good.

然后结合实时控制软件WinCon在实验装置上进行了实物控制，其效果良好。

Do experiment about slicing silicon by a novel approach of electric discharge-electrolytic hybrid machining strategy using hybrid electrolyte. The experiment shows that enhancing the pulse width or increasing the duty factor can increase the slicing efficiency.

采用水基复合工作液，对不同电阻率晶硅材料进行了电火花电解复合切割试验，试验证明，提高脉冲宽度或增大占空比可以增加切割效率。