Each of the four fundamental forces (gravity, electromagnetism, and the strong and weak nuclear forces) has a kind of theoretical knob that can be turned up or down to change its strength.

四种基本力(重力，电磁力，强作用力和弱作用力)都有一个理论把手，调节这东西可以改变力的强度。

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"It is time for change, the right kind of change, change that trusts in the strength of free people and free markets," he said.

他说：“是变化的时候了，适当的变化，将改变人们对自由人民和自由市场力量的信任。”

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The charismatic megafauna suffering most from climate change may well be the wolverine—a vicious predator known for its uncanny strength and tenacity.

受气候变化影响最大的动物种群可能是狼獾——一种以其神奇的力量和韧性闻名的残暴的捕食者，现实中的金刚狼。

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The interface with large text and icons is user-friendly, but achieving this means an absence of features you might find with popular router firmware dd-wrt, such as the ability to change signal strength or bridge together multiple networks for wider coverage.

FORBES: Western Digital Unveils Routers Designed to Speed Up Home Entertainment

In this year's survey, Americans were nearly evenly divided about whether and how the United States should change troop strength in Iraq: Twenty-four percent said more troops should be sent, 26 percent said troop strength should not be changed, 21 percent said some troops should be withdrawn and 25 percent said all troops should be withdrawn.

CNN: Poll: Americans divided over Iraq invasion

If you produce a short-term memory -- if you look up a telephone number you just remember for a short period of time (or) you meet somebody and remember their name briefly -- you have a transient change in the strength of communication.

CNN: A Nobel Prize with help from sea slugs