The watery, circulating juice of a plant. 树汁。 Any vital or health-promoting liquid constituent. 体液。 Hence, vigor; vitality. 【喻】元气;活力。 A saphead; a stupid person. 【俚】笨蛋;呆子。 A deep narrow trench, extending, often in a zigzag course, toward an enemy's lines. (为接近敌阵而挖掘之)地道。 To dig beneath; undermine, as a wall. 向下挖掘;(在墙等)下面挖掘使之损坏。 To weaken, as strength or confidence. 削弱(力气或信心)(常作讽刺语)。 Science was sapping old briefs. 科学动摇旧信仰。 sap the foundations of 逐渐削弱...的基础。 |