求翻译：从图2、3和表2可见，不同温度时效热处理10h的690合金试样的耐晶间腐蚀性能随着热处理温度的升高迅速上升（Ra比值迅速下降），至715℃的热处理温度时690合金的耐蚀性已很好，当时效热处理温度高于715℃时，Ra基本保持不变，且比值很低，说明试样具有很好的耐晶间腐蚀性能。是什么意思？

Seen from Figure 2, 3, and Table 2, the different temperature heat treatment of 10h Alloy 690 specimen resistance to intergranular corrosion rising rapidly with increasing heat treatment temperature (ra ratio of the rapid decline) to 715 ° C heat treatment temperature of 690 The corrosion resistance

From Figure 2, 3, and table 2 show that different heat treatment temperature limitations of the 10 H of the sample of 690 alloy corrosion resistance with crystal-an increase of the temperature heat treatment (Ra ratio rose rapidly declining rapidly) to 715 degrees, heat-treated at temperatures of C

From Figure 2, 3 and Table 2 obviously, the different temperature effectiveness heat treatment 10h 690 alloy test specimen bears the intercrystalline corrosion performance along with the heat treatment temperature ascension rapid rise (Ra ratio rapid drop), to 715℃ heat treatment temperature when 69

From Figure 2, and 3 and table 2 visible, different temperature limitation heat treatment 10h of 690 alloy specimen of resistance Crystal between corrosion performance as heat treatment temperature of rise quickly rose (Ra ratio quickly declined), to 715 ℃ of heat treatment temperature Shi 690 alloy