moist
adj.湿润的，多雨的(damp, humid)
It is moist in summer in the southern part of the country.
这个国家的南部地区夏季多雨。
ebb
n.退潮；衰落 vi.潮退，衰退(decrease, retreat)
terrestrial
adj.陆地
endemic
adj.地方性的
subterranean
adj.地下的
cavern
n.大山洞，大洞穴
The largest individual cavern ever discovered is in Malaysia and inside the cavern were the remnants of an ancient time.
迄今为止发现的最大单个洞穴是在马来西亚，洞穴里是远古时代的遗迹。
Antarctic
adj.南极的，南极地带的
Antarctica
n.南极洲
coastland
n.沿海岸地区
hemisphere
n.半球
The Northern Hemisphere is the part of the world north of the equator, and the Southern Hemisphere is south of the equator.
北半球是赤道以北的部分，南半球位于赤道以南。
contour
n.轮廓，外形(outline, profile);海岸线
The contour of the Atlantic coast of America is very irregular.
美国大西洋海岸的轮廓非常不规则。
lowland
n.低地，苏格兰低地 adj.低地的
navigation
n.航海
salinity
n.盐分，盐度
elevation
n.高地；正面图；海拔
formation
n.形成，构成
geothermic
adj.地热的
tropic
n.(天球的)回归线；热带
temperate
adj.温和的(moderate)