保持不变

Retail prices of staple foods remain unchanged.

主要食物的零售价持不。

In other words, The Hermiticity of a matrix is invariant under unitary transformations.

换言之，矩阵的厄密性幺正换下持不。

Thestabilized powders have obvious better oxidation resistance than unstabilized Pow-ders.And the other physical and chemical properties remain constant.

经钝化处理后的粉末，抗氧化性显著提高，而物理性能及化学组成持不。

No other trigraph sequence exists. Each ? that does not begin one of the trigraphs listed above is not changed.

不存三连符。每个不是上述某个三连符开始的?将持不。

A new concept is proposed,under which by utilizing a proven simple-cycle marine gas turbine a type of intercooling-cycle high-power marine gas turbine has been derived.

提出利用成熟的简单循环船用燃气轮机将派生为一型间冷循环大功率船用燃气轮机的新构想,并且原发动机燃气发生器的通流部分和结构大部分持不,以继承原机的可靠性。