演示

gěi xué sheng yǎn shì zěn yàng yìng yòng zhè yī dìng lǜ jiě jué shí jì wèn tí

给学生演示怎样应用这一定律解决实际问题

demonstrate to the students how to use the law to solve a practical problem

wǒ de zhù shǒu jiāng yǎn shì jī qì yùn zhuǎn qíng kuàng

我的助手将演示机器运转情况。

My assistant will demonstrate the machine in action.