He authored a history of the Civil War.他写了一本内战史.Then he opened a restaurant, authored a book, and landed his own radio show.后来他开了个餐馆，写了本书，还制作了自己的广播剧。Fall 2006's design will appear below , authored , perhaps, by you!...
Draw your child's outline with a heavy black marker.用浓黑色的毡笔画出你孩子的轮廓。He placed a marker where the ball had landed.他在球落地的地方放了个标记。Step off twenty feet and then place a marker in the ground.先步测20英尺,再在地上做出标记....
Make a checklist of the tools and materials you will need.把你需要的工具和材料开一张单子。In industry, diamond can form a tough, non-corrosive coating for tools.在工业上，金刚石可以用作工具表面坚固、耐腐蚀的覆盖层。You can buy all these tools at a do-it-yourself ...