在冰(bing)(bing)天雪(xue)地中跋涉,應警惕(ti)可能遇到(dao)的危險。·冰(bing)(bing)河洪(hong)水。太陽(yang)光照射(she)融化的冰(bing)(bing)水會使冰(bing)(bing)川(chuan)河水漲落(luo)不定。由于中午(wu)(wu)陽(yang)光最強(qiang),通常會在下午(wu)(wu)出現冰(bing)(bing)川(chuan)河洪(hong)峰(feng)。......
冬(dong)至(zhi)(WinterSolstice)--12月22日冬(dong)至(zhi)是(shi)農歷二十四節氣之一。太陽(yang)光在(zai)冬(dong)至(zhi)這(zhe)天(tian)(tian)直射南(nan)回歸線,北(bei)斗(dou)球白晝漸長。過了冬(dong)至(zhi)就進入“數(shu)九(jiu)寒天(tian)(tian)”。數(shu)九(jiu)是(shi)從冬(dong)至(zhi)這(zhe)一天(tian)(tian)算起(qi),9......
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