| 1. | The spacing is maintained constant .
格距保持不变。 |
| 2. | Blood progesterone remains constant throughout pregnancy .
血液孕酮含量在全妊娠期保持不变。 |
| 3. | Prices were previously expected to be constant at the old level .
以前价格预期在旧的水平上保持不变。 |
| 4. | The amplitude at the driven end is fixed by the driving mechanism .
由于驱动机构的作用，使驱动端的振幅保持不变。 |
| 5. | The level of the petrol in the chamber is kept constant by the action of a float .
室内汽油的水平高度由于浮子的作用保持不变。 |
| 6. | In other words, the hermiticity of a matrix is invariant under unitary transformations .
换言之，矩阵的厄密性在幺正变换下保持不变。 |
| 7. | There is a range of applied force over which the regression rate remains constant .
施加的力有一个范围，在这个范围内递减率保持不变。 |
| 8. | Under these conditions, the total mechanical energy remains constant, or is conserved .
在这种条件下，总机械能保持不变或机械能保存。 |
| 9. | If we hold one of the three variables constant, we can make a two-dimensional plot .
如果我们使三个变量中的一个保持不变，则可作二维曲线。 |
| 10. | In the special case in which w'is zero, the mechanical energy remains constant or is conserved .
在W’等于零的特殊情况下，机械能保持不变或称保守。 |
