不要去注意那些使你气馁的事情，无论你的道路是崎岖，是平坦，总当像一只轮船一样——不管雨天，晴天，依然向前行驶。
Pay as little attention to discouragement as possible. Plough ahead as a steamer does, rough or smooth--rain or shine.
海蝴蝶：一只正在游动的食肉性海蜗牛。它们拥有像翅膀一样的由足进化而来的侧翼(位于右下方)，并靠拍打侧翼在水中前行。
Sea butterfly: a swimming predatory Marine sea snail. They have two wing-like outgrowths (lower right) derived from their foot, which they continually flap to swim through the water.
如果只依靠风帆获得的风能，这艘游艇能以每小时30公里的速度悠闲前行。
Relying solely on its sails to catch the winds, the craft can achieve a leisurely pace of 30 kilometers per hour.
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