Since 1965 , nasa has launched a number of unmanned space probes to fly to or even land on mars . though these probes revealed that there were no artificial canals on mars , they found signs of recent liquid water on the subsurface of mars 美国太空总署自1965年曾多次发射无人探测船飞往火星，甚至登陆火星，虽然证实了火星上并无人造的运河，却发现即使在近代，火星地表下极可能仍有液态水的存在。
The spur line project would cause a direct net loss of 9 . 5 ha of wetlands at lok ma chau within the wetland conservation area adjacent to the mai po and inner deep bay wetland of international importance ramsar site and is ecologically unacceptable at both local and international levels . it would also set a very bad precedent for the conservation of the deep bay wetlands and would have implications for future developments within wca 支线工程将对落马洲湿地保育区造成9 . 5公顷渔塘净减少，其位置毗邻米埔及后海湾内湾拉姆萨尔国际重要湿地，于本地和国际层面均为不可接受的生态损失，亦会对后海湾湿地的存护和湿地保育区的未来发展，立下极不良的先例。
Stay cables of the long - span cable - stayed bridges are susceptible to vibration under wind loading , or wind incorporated rain excitation , or deck motion due to high flexibility , relatively small mass and very low inherent damping , such as vortex shedding , wake galloping , parameter resonance and wind - rain induced vibration . large - amplitude vibration of cables may reduce the life of cables and threaten safe traffic , and has been considered today as one of the most critical problems for this type of bridge 大跨度斜拉桥拉索具有较小的质量和极低的阻尼，在风、风雨及桥面振动等外部激励下极易发生振动，如涡激共振、尾流驰振、参数共振和风雨振等，拉索的大幅振动对拉索的使用寿命和桥梁安全运营构成极大威胁，它已成为大跨度斜拉桥急需解决的关键问题之一。
In second part , the results in imitation experimentation as follows : ( 1 ) there were few undergratuate who has " severe unjust behaviors " , but many who had " mild unjust behaviors " . ( 2 ) in all situationes , there were no significant difference in gender . ( 3 ) in situation " relating to self , " whether bring the information out into the open or not " significantly influenced just behavior 对61名大一学生的情境模拟实验的结果显示： ( 1 )大学生在情境模拟的情况下极少会出现“严重不公正”行为，但出现“轻度不公正”行为的人数较多； ( 2 )男女的公正行为没有显著差异； ( 3 )在“与己有关”的情境中， “信息公开与否”在公正行为上有显著的差异； ( 4 )大学生在“与己有关”和“与己无关”情境中的行为具有显著的中等程度相关。
Tensile stress field would appear in the proximity of arched vault after excavation , slacking of surrounding rock and subsequent dropping of blocks of rock from such area would possibly occur at any time in the context of extra - shallow depth . so i - steel arched support must be erected to provide against possible block dropping and be integrated into a ring with that of pilot tunnels on both sides 拱顶在核心土开挖后，在一定范围内出现拉应力区，在超浅埋情况下极容易掉块和发生围岩松驰，因此核心土必须边开挖边架设工字钢拱架，使之与左右导洞拱顶工字钢形成整体。
