Amplitude modulation is to control the amplitude of signal carrier and make it change linearly with modulation signals and maintain its frequency.

幅度调制是用调制信号去控制载波的振幅，使其随调制信号线性变化，而保持载波的频率不变。

youdao

It gives people the opportunity to make change that they would like to see in the world."

VOA: special.2009.07.01

So, for starters we'll keep that as our zero energy, we're going to change it soon to make something that makes more sense in terms of bonding, but we'll keep that as zero for now.

因此，首先我们将会保持零点能的这个定义，但很快我们就会对它进行修改,使它在讨论成键时更合理，但是目前我们还是暂时采用这种定义。

麻省理工公开课 - 化学原理课程节选

Think about the fix, don't make the first change that comes to mind and see if it works.

好好考虑要做什么修改,别抱着试试的态度直接实施。

麻省理工公开课 - 计算机科学及编程导论课程节选

It may all look like proof that the world's boycott of Hamas, intended to make it change its spots or leave power, is working.

ECONOMIST: Gaza

"It would either make them think twice about building on flood plain land or it would make them change the design basis upon which they're built, " he told BBC Radio 4's Money Box.

BBC: NEWS | Programmes | Moneybox | Call for flood insurance change

Reforms to make it easier to change employers would help both workers and the best employers.

FORBES: Want to Attract Jobs and Capital? Change U.S. Tax and Immigration Laws