polycrystalline silicon是什么意思

polycrystalline silicon是什么意思 英语翻译Cubic boron nitride（CBN）and polycrystalline cubic boron nitride（PCBN）inserts have traditionally been the tools of choice for hard-turning applications.But,they are considered too costly for many operations.The cryogenic machining 英语翻译.beta.-silicon carbide protective coating and method for fabricating same AbstractA polycrystalline beta-silicon carbide film or coating and method for forming same on components,such as the top of solar cells,to act as an extremely hard 英语翻译polycrystalline diamond element comprising ultra-dispersed diamond grain structures and applications utilizing same拜托用百度翻译或者google翻译神马的就算了，我也会的。那样翻出来根本不对 英语省读问题For:Looked silly /luk sili/If read like this,doesn't it make a ambiguity of tense.Listeners will not know it is look silly or looked silly?Will someone eliminate my confusion?One more question:For :Sent off /sent ɔf/ If we 求翻译,英译汉.（中等难度）it's bena lon time da i havtnt writn anith., so jus tak som sili notes~ i hav 2 thnk mani frens such as Mastr.O'donis, ZhuPaHeJiingYi, ShortCaiYiWen, TablmtsKKHuangJiaQi, LuoShengkai, LaiWenyu & My parens. They