持续: to continue, to persist, to last, sustainable, preservation...
面向: to face, to turn towards, to incline to, geared towards, catering for, -oriented, facial feature, appearance, aspect, facet...
哥哥: elder brother...
台阶: steps, flight of steps, step (over obstacle), way out of an embarrassing situation, bench (geology)...
届: to arrive at (place or time), period, to become due, classifier for events, meetings, elections, sporting fixtures, years (of graduation)...
市: market, city...
守护: to guard, to protect...
黑板: blackboard...
刚: hard, firm, strong, just, barely, exactly...
探索: to explore, to probe...
