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ostulated that all of the students in his class would pass the final exam。 老師要求他班上的所有學生都透過期末考試。
要點 postulate和suppose的含義相同，都表示“假設”，但不同的是postulate主要指為證實某個理論的正確性而進行的假設。
profitable［'prɑ：fit？bl］a。 有利可圖的；有益的
例句 1。 The government tried to make western farm products more profitable than that of the eastern。 政府試圖使西部的農產品比東部的農產品獲得更多利潤。
2。 After the middle of the seventeenth century； land reclamation decreased significantly as the price of agricultural products began to fall； making land reclamation far less profitable in the second half of the century。 17世紀中期以後，由於農產品價格開始下降，導致土地的復墾顯著減少，這使土地復墾的利潤在17世紀後半葉變得更少。
3。 This trade route is very important for Europe because it had built highly profitable mercial ties with other regions since the twelfth century。 這條貿易線路對歐洲來說非常重要，因為自12世紀以來，它與其他地區建立了高利潤的商貿聯絡。
proportion［pr？'p？：r？n］n。 比例；部分；均衡
例句 1。 Even though young generation only took a small proportion of the total population； it may have a massive local impact when a large proportion of the young men moved to other areas。 雖然年輕人只佔總人口的一小部分，但大部分年輕人移居到其他地區也會對當地產生很大影響。
2。 The proportion of empty space in a rock is known as its porosity； but the concept of porosity is not the same as permeability。 我們知道，岩石中真空的部分表明其多孔性，但是多孔性和滲透性並不是一個概念。
派生 proportionately（ad。 按比例地）
recruitment［ri'kru：tm？nt］n。 徵募新兵；補充
例句 Such people were recruited on an ad hoc basis from the area in which they were stationed； and there was obviously large…scale recruitment within Britain。 這些人是專門在駐地招募的，而在不列顛，顯然這種招募的規模很大。
response［ri'spɑ：ns］n。 回答；反應，響應
例句 1。 The technique depends on evoked potentials； which are electrical brain responses that may be related to a particular stimulus。 這種技術依賴於腦誘發電位，這是與特定刺激有關的腦電波反應。
2。 Researchers can careful
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