1.nutrition n.營養(yǎng)(the act or process of nourishing or being nourished)
詞根記憶：nutri(營養(yǎng))+tion--營養(yǎng)
例：A balanced diet is important in nutrition.
派生詞：nutritional(a．營養(yǎng)的，滋養(yǎng)的)
同根詞：nutritious(a．富含營養(yǎng)的)：nutrient(n.營養(yǎng)品：a．滋養(yǎng)的)
2.nutritious a．有營養(yǎng)成分的，營養(yǎng)的( nourishing)
詞根記憶：來自nutrition(n.營養(yǎng))
例：The milk of mammals would be less nutritious if it did not contain cannabinoids.
派生詞：nutritiousness(n.有營養(yǎng)成分)
同根詞：nutrient(n．營養(yǎng)物：a．營養(yǎng)的)
3.oats n.燕麥(a crop or plot of the oat)；燕麥片(oatmeal)
發(fā)音記憶：“餓吃”--餓了吃燕麥
注意：oatmeal(n．燕麥粥)
例：A breakfast cereal contains oats, raisins and nuts.
4.obese a．肥胖的(having excessive body fat)
發(fā)音記憶：“藕必是”--藕必是圓圓的--肥胖的
例：Many people become obese more due to the fact that their bodies burn calories too slowly than overeating.
派生詞：obesity(n.肥胖)
5.objection n.厭惡，反對(dislike or disapproval)
詞根記憶：ob(倒逆)+ject(投擲)+ion--反著投--反對
例：This objection was reasonable when only early theropod clavicles had been discovered.
同根詞：objective(n．目的：a．客觀的)
6.objective a．季觀的(external);n．目標，目的(aim, goal)
和object(n．目標)一起記
例：objective criteria客觀標準// political objective政治目標
派生詞：objectivity(n.客觀性)
7.oblique a．斜的，傾斜的(inclined)
詞根記憶：ob(躺)+lique(離開)--躺著都能滑開--斜的
例：an oblique angle斜角（包括銳角和鈍角）
8.obscure a．模糊的(faint, undefined)；v.使…不明顯(to make dim)
聯(lián)想記憶：ob(離開)+scure（跑）--越跑越遠漸漸地就看不清楚了--使…不明顯
例：Clark believes the possibility has been obscured by the recent sociological fashion.
9.observation n.觀測(an act of recognizing and noting a fact or occurrence); 遵守(an act or instance of observing a custom, rule, or law);觀察報告(a record or description so obtained)
詞根記憶：來自observe(v.觀察：遵守)
例：The first is an observation that the editorial disputes.
派生詞：observational(a．觀測的)
同根詞：deserve(v.應受，應得)