SevenyearsofcarefuldesignandplanningallcametogetheronMo...
问题详情：SevenyearsofcarefuldesignandplanningallcametogetheronMonday,whenJamesCameronbecamethefirsthumantomakeasolotriptothedeepestknownpointonearth-theChallengerDeep!Moreimportantlythough,heappearedsa...