保持不变

Retail prices of staple foods remain unchanged.

主要食物的零售价。

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换下。

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，其抗氧化性显著提高，而其他物理性能及化学组成基本。

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

存在其他三连符。每个是上述某个三连符开始的?将。

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用燃气轮机将其派生为一型间冷大功率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,以继承原机的可靠性。