1. Remember that silence si sometimes the best answer. 记住，有时候沉默就是最好的回答。
2. Electroplating and direct brushing technique were used to deposit commercial HTHP diamond powder on W needles and Si substrates to form cold cathodes. 采用电镀方法和直接刷涂的方法在钨针衬底和硅衬底上沉积高压合成的金刚石粉末形成冷阴极。
3. Influence of both Si and Al deoxidations were discussed on the steel quality. Especially, different levels of Al content on the steel quality were analyzed. 讨论了一些钢种用硅脱氧和用铝脱氧对钢质量的影响，以及用铝脱氧时，铝含量的高低对钢质量的影响。
英英解释
n.
1. a complete metric system of units of measurement for scientists; fundamental quantities are length (
2. a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's cru
3. the syllable naming the seventh (subtonic) note of any musical scale in solmization
