The function name starts with h because it combines pictures horizontally, and the next letter is c because the pictures are centered vertically.
函数名打头的h意思是水平组合（horizontally），而接下来的c表示竖直居中（centeredvertically）。
Hydrogen (H2) at the next catalyst separated into hydrogen ions (h) and electron, hydrogen ions through the solid electrolyte escape, so its concentration can be detected.
氢气(H 2)在催化剂的作用下分离成氢离子(H)和电子，氢离子穿过固体电解质逸出，因此可以检测出其浓度。
This includes the item price plus the fixed S&H price as stated in the next section.
这包括项目的价格，再加上固定 s 波黑价格正如在下一节。
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