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词语恒定拆分为汉字：
恒字的拼音、笔画、偏旁部首、笔顺、繁体字，恒字字源来历，恒字演变
持久：～心。～久。～定。～齿。永～。～星。～温。经常的，普通的：～言。姓。……
定字的拼音、笔画、偏旁部首、笔顺、繁体字，定字字源来历，定字演变
不动的，不变的：～额。～价。～律。～论。～期。～型。～义。～都（dū）。～稿。～数（shù）（ａ．规定数额；ｂ．指天命；ｃ．规定的数额）。断～。规～。鉴～。使不变动：～案。～罪。决～。确～。平安，平靖（多指局势）：大局已～。镇静，安稳（多指……
汉语拼音：héng dìng
反义词：变化
"Radiogenic decay is at a constant rate over the aeons, which can be measured by physically counting particles, " explained Bouvier.
Bouvier解释说：“放射性衰减亘古恒定不变，由此其可以通过物理学的颗粒计数来测量。”Until then you are expected to be in constant state of movement and this for you means progress through positive affirmative action.
在此之前，你们被期待着保持恒定的运动状态，这对你们而言，意味着通过积极肯定的行动而前进。The advantage of using collimated light is that it has constant angle of illumination over the surface being inspected.
使用被瞄准的光的好处是它有照明恒定的角度在被检查的表面。As if a constant flow of LOVE is coming down from above, through you and out to the world.
就好比一个恒定的【爱之流动】从天国注入人间，通过你们传达给世界。Many plant and animal species, which can only survive in constant habitats, have found a home here.
许多只能在恒定寄居地存活的动植物种都在此地安下了家。It is as if I am governed by an internal time-wasting law that says the amount of time wasted in any day is constant.
就好象我受到一条内在的浪费时间定律的控制，即我每天浪费的时间总量是恒定的。Thermal comfort exists if the human body in thermal equilibrium with its environment, implying a constant temperature of the body.
若人体与环境达成热平衡，以保持体温恒定，就谓之具有热舒适性。Put the wines in a dark place with a moderate, constant temperature, like the bottom of your closet, and drink up.
把酒存放在一个温度适宜而恒定的暗处，如衣橱的底部。然后尝遍每一种酒。"The virus needs at least one constant region, and that is the essence of calling it the Achilles heel, " he said.
这种病毒至少需要有一个区域是恒定不变的，这也就是为什么称其为致命弱点的原因了。