一年一次

The main contents are as follows:Firstly, starting with the general situation of soil erosion and the harms caused by it, the causes leading to the local soil erosion problem are analyzed comprehensively in the paper. And connecting with the measures taking place, sticking points towards the career of soil and water conservation are expatiated upon.Secondly, Back-Propagation Neural Network, One of Artificial Neural Network is used to set up a modal about the connection of the soil erosion modulus and seven factors impacts on it, such as, rainfall, rainfall largest intensity in 30 minutes, runoff coefficient, vegetation cover percent, rate of granule, rate of physical viscidity-clay, the rate of organic matter. Through the comparison with linear regression model, the second regression model, the Chinese Soil Loss Equation, it illustrated that BP Neural Network modal is more accurate than the other three modals in forecasting the mount of soil erosion, and the BP Neural Network will have some applicability in forecasting in soil erosion.

本文以霍山县作为皖西大别山区的典型区域，主要研究了以下内容：(1)从介绍霍山县土壤侵蚀状况以及所造成的危害入手，全面分析了导致当地土壤侵蚀发生的原因，并结合当地采取的水土保持相关措施，阐述了当地水土保持工作的症结所在；(2)结合上土市水土保持试验站多年实测资料和2005年实验资料，应用BP神经网络理论，建立了次降雨土壤侵蚀量与次降雨量、最大30min雨强、径流系数、植被覆盖度等因子之间关系的模型，并通过BP神经网络的预测模型与一次回归模型、二次回归模型、CSLE模型之间的对比分析，说明了建立的BP神经网络模型在土壤侵蚀预测可以取得较回归模型和CSLE模型更高的精度，也说明了BP神经网络理论在土壤侵蚀预报中具有一定的适用性。

On 22nd September 1941 Merten torpedoed his first ship the 5,302 ton British Steamer ss SILVERBELLE sailing in convoy SL87 and on the 6th November 1942 he sunk his last ship the 8,034 ton British Steamer ss CITY OF CAIRO.

1941年9月22日莫顿用鱼雷第一次击沉了重5，302吨的护卫SL87号航行的英国汽船&银美人&号，1942年11月6日最后一次击沉的是重8，034吨的英国汽船&开罗市&号。

Spain have named a Princess ship model carved the letter is as follows: Total of the ship sailing for 50 years, of which 11 glaciers experienced, 6 times by pirates looting, 9 times the ship collided with another, 21 times stranded anchor failure.

有一只名字叫西班牙公主号的船舶模型上雕刻的文字是这样的：本船共计航海50年，其中11次遭遇冰川，有6次遭海盗抢掠，有9次与另外的船舶相撞，有21次发生故障抛锚搁浅。

You may think this odd, but I have kept copies of every tax return I filed, starting with the return for 1944. Checking back, I find that I purchased GEICO shares on four occasions during 1951, the last purchase being made on September 26. This pattern of persistence suggests to me that my tendency toward self-intoxication was developed early. I probably came back on that September day from unsuccessfully trying to sell some prospect and decided - despite my already having more than 50% of my net worth in GEICO - to load up further. In any event, I accumulated 350 shares of GEICO during the year, at a cost of $10,282. At yearend, this holding was worth $13,125, more than 65% of my net worth.

你可能会觉得很奇怪，不过打从1944年开始报税到现在，我都保留每年个人报税的资料，在将这些资料拿出来比对之后，我发现在1951年我总共分四次买进GEICO股份，最后一次是在9月26日，这样的做法让我觉得自己很早就有自我沉醉的倾向，印象中我那时是在向别人推销这批股票不成之后，决定自己吃下这批股票，尽管在当时我已将个人50%以上的身家全都押在这支股票之上，而在加码之后，我总共持有350股的GEICO股份，成本为10，282美元，到了年底，这些股票的市值成为13，125美元，超过个人净值的65%。

In early 1986, I launched my campaign for reelection, this one for a four-year term.

1986年初，我开始竞选连任，这次的任期是四年。1984年，选民通过了一项修正案，把州长任期从两年改为四年，这是1874年州里实行&重建时期宪法&以来的第一次。

Preservationists in Iowa reckon they are losing 1,000 barns each year.

爱荷华的保护主义估计他们每年将失去1000个谷仓。2007年的农业普查是第一次对谷仓进行追踪；下一次估计要到2012年。

Preservationists in Iowa reckon they are losing 1,000 barns each year.

爱荷华的保护主义者估计他们每年会失去1000个谷仓。2007年的农业普查是第一次对古老的谷仓进行追踪调查；下一次普查要等到2012年。

THE war that has just erupted apparently without warning between Israel and Lebanon looks miserably familiar. The wanton spilling of blood, the shattering of lives and homes, the flight of refugees: it has all happened in much the same way and just the same places before. In 1982 an Israeli government sent tanks into the heart of Beirut to crush the "state within a state" of Yasser Arafat and his Palestine Liberation Organisation. A quarter of a century later, Israel's air force is pulverising Lebanon in order to crush the state within a state established there by Hizbullah, Lebanon's Iranian-inspired "Party of God".

我们再一次看到了充斥着鲜血、家破人亡的惨象以及战争难民的极其熟悉的荒谬场面——一个在同样的地方用同样的方式多次重复着的场面。1982年，当时的以色列政府曾派出坦克直捣贝鲁特去摧毁阿拉法特以及其领导的巴解组织设立于黎巴嫩的&国中之国&。25年之后的今天，以色列空军正在为了铲除领伊朗人意旨的&真主党&在这里设立的&国中之国&而碾碎黎巴嫩。

Ended after in 1870 at the franco-prussian war, the third republicproclaims the founding of (period once appeared the global firstproletariat political power - Paris commune), this republican systemcontinuously continued to 1940 to seize in Second World War byGermany.

在普法战争结束后的1870年，第三共和国宣告成立（期间曾一度出现了全球第一个无产阶级政权——巴黎公社），这一次共和体制一直持续到1940年在第二次世界大战中被德国占领。

The volcano has had more than 20 eruptions since 1616, the most destructive eruption of Mayon occured on February 1, 1814 when it buried the nearby town.

从1616年以来，爆发过二十多次，造成最大灾害的一次是1814年2 月1日，曾湮没了附近小镇。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。