当得到的东西比预计的要少时: regarding something less than what was desired
知识: 1.(认识和经验的总和) knowledge; know-how; science 短语和例子知识更新 update one's knowledge; the advancement of one's knowledge; 知识化 、专业化 become knowledgeable and professional; 知识就是力量。 knowledge is power.2