expression n. 1.表現(xiàn),表示,表達(dá)。 2.詞句;語(yǔ)句,措辭,說法。 3.表情,臉色,態(tài)度;腔調(diào),聲調(diào)。 4.【數(shù)學(xué)】式,符號(hào)。 5.(油的)榨出,壓榨。 6.【生物學(xué)】表現(xiàn)度。 emotional expression 表情。 a happy expression 妙言。 an odd expression 怪話。 the expression of the eye 眼睛表情,眼色。 a smiling expression 笑臉。 beyond [past] expression 形容不出,無(wú)法表達(dá)。 find expression (in) (在…中)表現(xiàn)出來…,表現(xiàn)在…。 give expression to 表達(dá),反映(give the fullest expression to their initiative 充分表現(xiàn)他們的積極性)。 expression mark 【音樂】表示感情色彩的符號(hào)。 adj. -al 表現(xiàn)的;表情的。 n. -ism 【美術(shù)】表現(xiàn)主義;表現(xiàn)派。 -ist 1.n. 【美術(shù)】表現(xiàn)主義者,表現(xiàn)派。 2. 表現(xiàn)派的〔亦作 expressionistic〕。 adj. -less 缺乏表情的,呆板的。
Negates any boolean expression which can include keywords , such as like , null , between , in , and exists 對(duì)任何布爾表達(dá)式它可包含如like null between in和exists這樣的關(guān)鍵字求反。
Assertions represent boolean expressions that the programmer believes to be true at specific points in the program 斷言表示為一些布爾表達(dá)式,程序員相信在程序中的某個(gè)特定點(diǎn)該表達(dá)式的值為真。
Statement can be used to execute one of two blocks of program statements , depending on the value of a particular boolean expression 語(yǔ)句可以如何用于根據(jù)一個(gè)特定布爾表達(dá)式的值,來執(zhí)行兩個(gè)程序語(yǔ)句塊中的其中一個(gè)。
On the other hand , it is expressible as a boolean expression if you accept including function calls in the boolean expression 但換個(gè)角度,如果你允許在布爾表達(dá)式中植入包含函數(shù)調(diào)用,則它就是一個(gè)布爾表達(dá)式可表述的屬性。
Boolean expressions are intended precisely to express runtime true or false properties ? properties that at any point in the execution may hold or not hold 布爾表達(dá)式的設(shè)計(jì)意圖就是表達(dá)運(yùn)行時(shí)值為真或假的屬性,在某個(gè)時(shí)刻判斷此屬性的值就可以決定執(zhí)行是否繼續(xù)。
Boolean expressions are r nintended precisely to express runtime true or false r nproperties ? properties that at any point in the execution may hold or r nnot hold 布爾表達(dá)式的設(shè)計(jì)意圖就是表達(dá)運(yùn)行時(shí)值為真或假的屬性,在某個(gè)時(shí)刻判斷此屬性的值就可以決定執(zhí)行是否繼續(xù)。
What is quite easy to express with boolean expressions , for example , is a property that if you ' re adding an element at the end of a list , the last element of the list is now the one that you just added 舉例來說,如果你將一個(gè)元素增加到列表末尾,該列表當(dāng)前的最后一個(gè)元素就是你剛剛增加的元素。
But , because they are strictly functional boolean expressions , they are limited in their expressiveness - how would we encode our first rule for stacks into an assertion , for instance 但是,由于它們是嚴(yán)格的函數(shù)布爾表達(dá)式,它們被限制在自己的表達(dá)中例如,我們將如何把堆棧的第一條規(guī)則編寫到斷言中?
This program creates truth tables from boolean expressions . i believe that it ' s very useful for computer science students who learning boolean algebra and predicate logic ( like my self ) 這個(gè)程序從布爾表達(dá)式中創(chuàng)建真實(shí)的表格。我相信對(duì)于學(xué)習(xí)布爾代數(shù)學(xué)和謂詞邏輯的計(jì)算機(jī)科學(xué)學(xué)生(像我自己這樣的)來說它是非常有用的。
The second occasion where boolean expressions may seem restrictive is one that scares most people who have looked at the issue from a theoretical perspective : the language of boolean expressions is relatively limited and doesn ' t have first - order predicate calculus 很多人從理論角度考察時(shí),又驚懼地發(fā)現(xiàn)布爾表達(dá)式形似柔弱的第二種情況:使用布爾表達(dá)式的語(yǔ)言有局限性,因?yàn)椴痪邆湟浑A謂詞演算特性。