Relational calculus

[計(jì)] 關(guān)系演算

?? 詞語組成解析

relational [ri'le??nl]
adj. 親屬的,相關(guān)的,有關(guān)的;
calculus ['k?lkj?l?s]
n. [醫(yī)]結(jié)石,石,積石,牙垢;[數(shù)]運(yùn)算,演算,微積分(學(xué));
ule,ulus 后綴;表”小,少”#詞根助記:calc石頭(古時(shí)候用石頭來計(jì)算)##calc 石灰,石頭#詞根助記:calc石頭(古時(shí)候用石頭來計(jì)算)

??? 情景例句

Can I help?
要我?guī)兔幔?/div>
Would you please take a message?
請(qǐng)你代我留話好嗎?
My old friend, Harrison, had lived in the Mediterranean for many years before he returned to England.
我的老朋友哈里森在回到英國(guó)以前曾多年居住在地中海地區(qū)。
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