較新的材料, 如 Syton 這種化學(xué)?機(jī)械拋光劑正開(kāi)始使用.Newer materials, such as Syton, are chemo - mechanical and are beginning to be used.這方面對(duì)農(nóng)藥, 特別是較新的化合物的批判性的評(píng)價(jià)是適當(dāng)?shù)?A more critical evaluation of pesticides in this regard, particularly newer ...