Shelf life policy for solders and other non chemical products.
焊料及其他非化学产品的保质期政策。
Using the principle of chemical kinetics, it is possible that changing the storage conditions can shorten the shelf life of tea.
利用化学动力学的原理，改变储存环境条件来缩短食品储存期，可以在短时间内得到相当于试验材料较长的储存期。
Trans fats are liquid oils that are put through a chemical process called hydrogenation to make them more solid and extend shelf life.
反式脂肪是液态油经过所谓氢化的化学处理后变为固态，且保质期延长。
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