词汇	grade of pencil
释义	grade of pencil 铅笔硬度
随便看	opening China opening circuit switch opening circulate cooling system Opening cities along land frontier opening cities along the border opening clause opening, cleaning opening ceremony Opening Ceremony and Gala Dinner Opening Ceremony and Keynote Address Opening Ceremony and Keynote Speech opening ceremony of Olympic Games Opening ceremony of sport meeting opening ceremony of sports meet opening chamber opening chance opening click opening, closing opening,closing and changing opening, closing and changing opening,closing and pivoting Opening /closing ceremony opening-closing cycle opening-closing die mechanism opening/closing price