两年一次的

He ought two or three times a year to make his rounds and visit the manors of his stewardship, and then he ought to inquire about the rents, services, and customs, hidden or withdrawn, and about franchises of courts, lands, woods, meadows, pastures, waters, mills, and other things which belong to the manor and are done away with without warrant, by whom, and how: and if he be able let him amend these things in the right way without doing wrong to any, and if he be not, let him show it to his lord, that he may deal with it if he wish to maintain his right.

土地管理者应在一年中用两三次时间巡视并查看在其管理职位下的封建采邑，继而询问有关土地租金劳役惯例的实行情况，有无隐瞒或撤消权利的情况发生以及有关庭院土地森林牧场草地水磨坊和其他一些归于庄园但未经正当理由就予以废除的财产。并弄清是由何人废除，如何废除的。如果这些人能补偿损失，就让他们用正确的方法修复这些财产而保证不会在任何一件事项上出错。如果自己要维持权利，就得处理好相关事宜。

A decade passed between the discovery of penicllin byAlexander Fleming and the development of a purification tech-nique by two British researchers that took the "miracle 0 drug"offthe shelf and placed it into medical practice,in time for use duringWorld War Ⅱ.

亚历山大·弗莱明发现青霉素之后又过了十年，才有两位英国医学研究人员研究出一种纯化的技术，将这种"神奇的药"从架子上拿下来用于临床医疗，恰好赶上在第二次世界大战中使用。

Birds that live in harsh1 deserts and grasslands usually molt twice a year,in spring and in autumn.

生活在环境恶劣的沙漠和草原的鸟通常一年换毛两次，分别在春季和秋季。

One year the likelihood issues sheet twice only before, every time the amount of order is 5 container, but after financial crisis, the enterprise becomes more careful, the goods of 8 container can tear open 67 sheet.

以前一年可能只下两次单，每次订单的数量是5个集装箱，但是金融危机以后，企业变得更加谨慎，八个集装箱的货会拆成六七个单。

I can remember years that yielded just one or two.

我记得有很多年都只有一两次这样的机会。

When the Romans defeated King Antiochus Ⅲ 's Syrian forces at Magnesia in 189 BC, they demanded that Hannibal, Antiochus' advisor and the man who had routed Roman forces at Lake Trasimeno and Cannae three decades before, be handed over to them.

公元前一八九年，罗马在马格尼西亚打败了利亚国王安条克三世的军队，要他交出谋臣汉尼拔。三十年前，汉尼拔在特拉西梅诺湖、坎尼两次战役中大败罗马军队。

The one thing Beckett, who missed two starts with a skin tear on his pitching hand, doesn't have on his 2007 resume is a quality start against the Yankees, though he did win a 7-5 game in April.

北极因为手指上的水泡错过了两次先发轮值，在2007年对抗洋基成绩中没有任何一场优质先发，虽然他曾经在四月的一场比赛以7比5获胜。

Through the analysis and contrast between HM core and Dh core, combined with the data of AMS14C, six pollen assemblages were ploted Out. At the mean time, six stages about the vegetation change and climate fluctuation were rebuild. In addition, there were three sub-assemblages ploted out in the Atlantic period, Sub-Boreal period and Sub-Atlantic period, which reflected the less vibration of the large-scale climatic change. Pollen assemblage dominated by Concentricystes in the hard and green clay of late Pleistocene can make it sure that the hard green clay layer was formed by water.

通过对上海地区鹤鸣孔和东海1井两个钻孔进行孢粉分析鉴定和对比，结合AMS14C测年等资料，划分出了6个孢粉组合带，恢复了本区的植被演化和气候波动的6个阶段，对鹤鸣孔的大西洋期、亚北方期和亚大西洋期各划分出了两个孢粉组合亚带，反应了大气候环境下气候的次一级波动，在晚更新世晚期的硬绿色粘土中还发现了以环纹藻为主的孢粉组合，从孢粉学角度上证实了这一硬绿色粘土层&水成沉积&的观点。

A few of the patients in Bukavu tested positive for the virus twice, but over the following year showed no signs of having dwindling numbers of the type of immune cells normally destroyed as HIV replicates.

在布卡武，有几个患者两次HIV检测结果呈阳性，但在随后一年里却未出现任何因HIV复制所致免疫细胞数量减少相应的症状。

It took Cockcroft and Walton five years to build a machine that worked. Finally, in April 1932, they had a machine that produced a steady stream of hydrogen nuclei with an energy of about half a million volts. They were carefully measuring the quality of the stream, in no hurry to begin doing nuclear experiments. On the morning of April 13, Rutherford came into their room, saw what they were doing, and lost his temper. He told them to stop wasting their time and do some science. The next day, Cockcroft was occupied with other business. Walton was alone in the laboratory, ready to do the first experiment, using his hydrogen nuclei to bombard a target made of the light metal lithium. The result was spectacular. The lithium nuclei were split in two and fell apart into pairs of helium nuclei.

用了五年时间，考克饶夫和华尔顿建造出了第一台能运行的加速器，最终，在1932年，他们制造出了能够提供稳定氢粒子流的加速器，粒子能量大约为50万伏特，他们并没有急着做核试验，而是精心测量了粒子流的性质，4月13日清晨，卢瑟福来到他们的房间，看到他们还在测量，大发雷霆，告诉他们停止浪费时间，开始科学研究，第二天，考克饶夫就被安排了其他事情，只剩华尔顿一个人在实验室里，准备做第一次实验，用他的氢粒子流轰击用轻质金属锂作的标靶，结果极为壮观，锂原子被分裂成两半形成一对氦原子，氦原子释放出的能量比氢原子注入的多达三十倍！

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。