評論
打印
1.validity n．有效性；合法性(state of being legally acceptable)；正確性(state of being right)
詞根記憶：來自valid(a．有效的，合法的)
例：The validity of a new scientific finding was questioned by most scientists.
2.vanish v.消失(to pass quickly from sight)
詞根記憶：van(空)+ish--消失
例：Of the five hundred million different species of living creatures that have appeared on Earth, nearly 99 percent have vanished.
同根詞：vanity(n．空虛；虛榮)
3.variable n．可變物(something that is variable)；變量，變數(a quantity that may assume any one of a set of values)
詞根記憶：vari(變化)+able--可變的--變量
例：The key variables driving costs are size and type of order.
同根詞：variation(變動)：varied(各式各樣的)
4.variation n．變化：變異（the act or process of varying）
詞根記憶：vari(改變)+ation(狀態)--變化
例：There is a considerable degree of variation in shade of color between weeds of different species.
同根詞：variable(a.易變的;n．變量)
5.varsity n．大學(university)；大學代表隊（尤指體育）(the principal squad representing a university, college, school, or club especially in a sport)
例：Their level of participation in extracurricular activities and varsity sports is unusually high.
6.vegetarian n.素食者(one who believes in or practices vegetarianism);a．素食的(consisting wholly of vegetables fruits, grains, nuts, and sometimes eggs or dairy products)
詞根記憶：veget(植物)+arian--只吃植物的人--素食者
例：Vegetarians refer to those whose diet consists of plant products only.//The diet of the ordinary Greek in classical times was largely vegetarian.
7.vegetation n．植被(plant life or total plant cover( as of an area))
詞根記憶：veget(植物)+ation--植物的集合--植被
例：The relationship between vegetation and climate is not direct.
同根詞：vegetarian(n．素食者)
8.vegetative a.植物的，有關植物生長的(relating to, composed of，or suggesting vegetation)
例：A plant's fecundity is high if it can reproduce quickly by means of vegetative growth.
9.vein n.紋理(texture)；礦脈(a regularly shaped and lengthy occurrence of an ore);靜脈(a blood vessel that carries blood from the capillaries toward the heart)
例：A gold-quartz vein system originates in magmatic fluids.
adj. 可變的，易變的
n. 變量，易變的東
