在作功冲程期间,气门的位置都是关闭的.The position of the valves during the power stroke are both closed.动力冲程的后段是绝热膨胀过程.The remainder of the power stroke is an adiabatic expansion.当排气冲程开始时, 气缸被向上运动着的活塞刮掠.When the exhaust stroke starts, the...
Why has this article, this admission from NASA, emerged at this time?为什么NASA承认(事实)的这篇文章会在这个时候出现 呢 ?Should NASA be split into separate science and astronautics agencies?nasa是否应解体成不同的科学与太空机构?NASA is hedging its bets and ad...
然而,真实的支出额可能少于所宣称的数字.The headline figures probably flatter the true amount to be spent, however.对, 这部分支出额与总收入相平衡.Yes, the figure of total group outgoings exactly balances out with the total income....
Many of the tribe's customs and rituals are as old as the hills.这部落的许多风俗、仪式都极其古老.Here the whole tribe is divided into two great exogamous classes or moieties , Kroki and Kumite.在这里,整个部落分为两个级别:克洛基和库米德.The village tri...
She'd mentioned it casually once, surprising him by her unconcern.她曾随口提到过，当时她的冷漠很让他吃惊。Johnson was clad casually in slacks and a light blue golf shirt.约翰逊身穿休闲宽松的长裤，配以淡蓝色高尔夫衬衫。They were smartly but casually dressed; p...
绳索滑轮系统a system of ropes and pulleys这块大石是用绳子和滑轮给吊起来的.The stone was lifted by means of a rope and pulley.工人把金属丝穿在滑轮上.The worker threaded the wire through the pulley....