实验结果表明，由于载体寿命的变化，在吸收和增益区域，带宽的时滞随着调制频率的变化而变化。
The experiment shows that the bandwidth of the time delay as a function of the modulation frequency changes in the absorption and gain regimes due to the carrier-lifetime variation.
讨论了流速分布均匀性对催化转化器转化效率和载体寿命的影响；压力损失对发动机动力性、经济性的影响。
The effects of the velocity distribution uniformity on conversion efficiency and durability and pressure loss on engine power and fuel economy have been discussed.
D3520载体对活性组份具有良好的吸附性能，延长了催化剂的使用寿命。
The active component can be well adsorbed on the support(D3520), on which the lifetime of the catalyst is prolonged.
某些制备技术可以有效地防止催化剂与载体的反应，从而延长了催化剂的使用寿命。
Some novel preparations prevent the catalysts from reacting with the supports, and thus extend the catalyst service life.
某些制备技术可以有效地防止催化剂与载体的反应，从而延长了催化剂的使用寿命。
Some novel preparations prevent the catalysts from reacting with the supports, and thus extend the catalyst service life.
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