英语翻译In each experiment,special attention was given to themea

英语翻译In each experiment,special attention was given to themeasurement of drying curve.Variations of ambient temperatureand vacuum pressure during drying were also recorded.Figure 4 shows the drying curves for conventional freezedrying and dielectric-material-assisted microwave freeze dryingat 258C.It was attempted to replace the SiC rod with aquartz rod so as to show the effect of microwave heatingwithout the assistance of the dielectric material.The absorptionof microwave energy was so low that the reflectedenergy burnt the magnetron because there was no dummyload to absorb the reflected power in this arrangement.Thus,no experimental data could be collected on microwave freezedrying without dielectric material assistance.It can be seenin Figure 4 that the drying time was 126 min for dielectricmaterial-assisted microwave freeze drying,21.3% shorterthan 160 min required with conventional freeze drying.Thisindicates that dielectric-material-assisted microwave freezedrying is workable,and the use of the dielectric material inmicrowave freeze drying can indeed enhance the freeze dryingprocess as predicted.14得通顺