variable adj. 1.易變的,變化無常的,無定的 (opp. constant, steady)。 2.可變的,能變的;變換的。 3.【數(shù)學(xué)】變量的;【天文學(xué)】變光的;【生物學(xué)】變異的。 Prices are variable according to the exchanges. 物價(jià)跟著匯率變動(dòng)。 a man of variable character 反復(fù)無常的人。 a rod of variable length (伸縮)如意棒。 a word of variable construction 可以作種種解釋的詞。 variable capital 可變資本。 a variable budget 臨時(shí)預(yù)算。 n. 1.易變的東西。 2.【數(shù)學(xué)】變量,變數(shù),變項(xiàng),變?cè)?(opp. constant);【天文學(xué)】變星 (=variable star);【航海】(方向不定的)變風(fēng),不定風(fēng) (opp. trade wind); 〔pl.〕 (貿(mào)易風(fēng)帶中的)變風(fēng)帶。 adv. -ably ,-ness n.
Thereupon , in the 3rd chapter , the characteristics of the ecological systems are discussed and the necessity of aggregation is proposed , then , the method of choosing macro - variables is discussed , and the aggregation method for the systems of ordinary differential equation is proposed . in the 4th and 5th two examples : the model of single population and the model of two populations in different environment are discussed , the method which have proposed in 3rd chapter is implemented in the two examples 同時(shí)在第四章和第五章中分別介紹生態(tài)系統(tǒng)中的兩種情況:?jiǎn)挝锓N的發(fā)展模型和兩物種在不同環(huán)境中競(jìng)爭(zhēng)的模型,分別介紹了對(duì)這兩種模型建立過程,并且應(yīng)用第3章中介紹的方法對(duì)上述兩種模型進(jìn)行聚合。然后,對(duì)聚合后的聚合模型進(jìn)行分析,得到聚合模型的穩(wěn)定狀態(tài)。