Ignoring feelings of tiredness knocks our body clocks out of kilter...忽视疲劳感会打乱我们的生物钟。Ignoring feelings of tiredness knocks our body clocks out of kilter.忽视疲劳感会打乱我们的生物钟。President, parliament and public are out of kilter.总...
若干研究已经发现了两个重要常量。Two significant constants have been found in a number of research studies.其值不变的量称为常量.A quantity whose value remains unchanged is called a constant.在无外力时,质心的速度是常量.The velocity of the center of mass is cons...