对外: external, foreign, pertaining to external or foreign (affairs)...
掩饰: to cover up, to conceal, to mask, to gloss over...
一同: along, together...
海面: sea level, sea surface...
造福: to benefit (e.g. the people)...
坦然: calm, undisturbed...
分布: to scatter, to distribute, to be distributed (over an area etc), (statistical, geographic) distribution...
陈列: to display, to exhibit...
换言之: in other words...
苛刻: harsh, severe, demanding...
