In the process of formation, the material must have received an environmental signal that reflects a change in climate and that can be deciphered by modern physical or chemical means.

在形成的过程中，材料必须接收到环境信号，反映气候变化，并能被现代物理或化学手段破译。

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Small sugar fragments can set off a signal cascade that increases inflammation and scar formation. A small peptide can block this process and allow scar-free healing

糖碎屑能引发皮肤快速发炎和形成疤痕的显著层叠。

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Also, pneumonia raises blood levels of a type of a chemical signal called a cytokine that promotes the formation of blood clots and that decreases the efficiency of the heart.

而且，肺炎可升高一种称为细胞因子的化学信号的血液浓度，此化学因子可促进血栓形成并降低心脏工作效率。

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With both beginning new terms after Obama's re-election last year and Netanyahu's recent formation of a new government, the president's visit was an opportunity to reset the relationship and signal unified positions on major issues such as the Middle East peace process and Iran's efforts to develop a nuclear weapon.

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