前进的

At the time of dealing with the fourth problem, we try calculus of variation of spending, move route transform into a line issue of the victory, Utilize Euler formula , ask and publish time running orbit after a little while most , confirm right route most, It's a pity that we can't get a satisfactory answer in a short time.

得到如下结果：在水流速度不变的情况下，年第一名的游速为，与方向与X轴成，如竞渡者以行进，则与X轴成，用时分秒，竞渡者若与对岸垂直游不可能达到终点；在不同区段内水流速度不变的情况下，竞渡者以折线前进，用时约为；在同一区段内水流速度变化情况下，竞渡者以曲线前进，用时约为。

Characterized by, when the hydraulic cylinder forward, from the hydraulic cylinder on the right and from the left side of the discharge of oil into the hydraulic cylinder, to increase the oil into the mouth of the fuel, hydraulic cylinders can fast-forward, but also to Hydraulic cylinder thrust smaller.

其特点为，当液压缸前进时，从液压缸右侧排出的油再从左侧进入液压缸，增加进油口处的油量，可使液压缸快速前进，但同时也使液压缸的推力变小。

By now in the hopper sand how many changed to the draft control, when the advance must examine that in fights sand how many to decide, the advance backlash must be flexible, when the sand bed landslide mechanical work strenuous or does not draw wants the hauling rope to loosen, causes the ship to draw back backward, up to until digs moves.

这时料斗内沙子的多少改用牵引控制，前进时要查看斗内沙子的多少而定，前进后退要灵活，如遇沙层塌方机械工作吃力或拉不动时要牵引绳松开，使船向后退，直至挖动为止。

5S-160GP/9T-160 consists of a main case driven by 3-shaft fixed spindle and a rear mounted auxiliary case driven by planet gears. The main case has 5 forward speeds and 1 reverse speed. The auxiliary case has 2 speeds which double the speed of the main case, so that the transmission has 9 forward speeds, the 4 forward speeds of main case shift by ZF-BK short travel synchronizer, auxiliary case shift by lock ring synchronizer, crawler and reverse shift by join sleeve powered by the engine of 280-380 hp.

5S-160GP/9T-160型变速器由三轴传动的主变速器和后置的行星齿轮传动副变速器组成，主变速器有五个前进档和一个倒档，副变速器有两个档位，可将变速器的档位增加一倍，故变速器具有九前一倒档，主变速器4个前进档采用ZF-BK型短行程同步器换档，副变速器采用锁环式同步器换档，爬档和倒档采用接合套换档，用户可根据需要选装部分功率取力器N71 /1或N71/2， N70。

The prior order of the influencing factors for the seedling-standing ratio of the tranplanter is height of throwing bowl, advancing velocity of the equipment, and slideway obliquity for testing with covering.

影响栽植器立苗率的主次因素，有覆盖物时是：滑道尾部的离地高度、机具前进速度、滑道倾角；无覆盖物时是：滑道尾部的离地高度、滑道倾角、机具前进速度。

The peculiar and humorous dual-head jeep brings up the dualistic thoughts on the elapse and relapse, beginning and finish of time——go forth backwardly or recede forwardly.

造型怪异诙谐的双头吉普，带着艺术家对时光之流逝与追溯、起始与终结这种双重性的思考，前进着倒退、亦或是倒退着前进。

But Gu Ge is holding to advancement all the time however, original they do not take seriously for the person, but going up century 90 time are terminal, people more and more the foudroyant competition advantage that sees they are searching result field place to have clearly, then, this company achieved very powerful ongoing kinetic energy suddenly also.

可是谷歌却在一直坚持前进，最初他们并不为人重视，但是在上世纪九十年代晚期，人们越来越清楚地看到他们在搜索结果领域所拥有的压倒性竞争优势，于是，该公司也突然获得了极为强大的前进动能。

His ideal would be to Americanize India. He is not at all pleased with Gandhi's retrogressive mania. Forward, he says, just like a YMCA man.

他的理想是把印度美国化，他根本不赞同甘地的倒退狂热，他说，&前进&，像&基督教青年会&会员那样前进。

So we call on Mugabe and his ZANU-PF party to act in good faith and move forward on re-establishing democracy and creating conditions for full economic recovery in Zimbabwe, he said.

因此，我们呼吁穆加贝和他的民盟党诚意行事，继续前进再前进，建立民主和建立在津巴布韦的经济全面复苏的条件，他说。

On 21 july the combat group "Dieckman" was ordered to advance along the north wing of the Mountain Army Corps, moving as far as possible toward the east in order to facilitate the movement of it.

7月20日，第39山地军已经突破了苏军的防御阵地向东前进了10公里。7月21日，&Dieckman&战斗群受命沿着这个山地军开辟的道路向北前进，尽可能地向东推进。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。