Finally the structures were released in a 49 % HF etch.最后在49%F中腐蚀形成这些结构.More often , all of the materials etchant have a finite etch rate.剂中的材料都具有一定的刻蚀速率.Can some one suggest a suitable etch or sequence of etches to achi...
从某种意义上看来,他们似乎是宇宙人.It's as if they were in some sense cosmic beings.从某种意义上讲,他们似乎是宇宙人.It's as if they were, in some sense.从某种意义上讲, 她们似乎是宇宙人, 同咱们这一些凡夫俗子形成了鲜明的对比.It's as if them were, in some sense, cosmic ina...