Once the oxygen content of the air had risen to 25% it was ready to burn.
一旦氧氣在空氣中的含量達到25%,它就要燃燒。
高三英語課文 Unit 18 Office Equipment

?? 句中詞匯解析

從本句中提取的重要詞匯

once [w?ns] 詞頻1
adv. 一次,一趟;一倍;曾經;一旦; conj. 一旦…就…;一經; n. 一次,一回;
?? on=one一+ce次 → 一次
"Once in the bloodstream, the bacteria adhere to the surface of the red cells."
細菌一進入血液里,就附著在紅細胞表面上。
近義:heretofore, occasionally, onetime, previously, sometimes, thereinbefore
content ['kɑnt?nt] 詞頻1 詞根: con
n. 內容;(書等的)目錄;滿足;容量;
?? con全部+tent握住→全部拿住→內容,容量;滿足的
"He seemed more content, less bitter."
他看起來比較滿意,不那么失望。
近義:volume, contents, pleased, satisfied, chuffed, contented 反義:pain, roil, undeceive, vex, disillusionize, disillusionise
oxygen ['ɑks?d??n] 詞頻2 詞根: oxy
n. [化]氧,氧氣;
?? oxy含氧的+gen出生,產生→氧氣
"the first Briton to climb Everest without oxygen"
第一個未借助氧氣設備登上珠穆朗瑪峰的英國人
ready ['r?di] 詞頻1
adj. 準備好的,現成的;即時的,敏捷的;情愿的;即將的; vt. 做好…的準備; adv. 預先;已完成地; n. 現款;
?? 準備好,再讀(read)一(y)遍
"Everyone, allow me face, come back tomorrow when I have everything ready."
各位, 給我一個面子, 等明天我把一切準備好了再請你們過來玩吧.
近義:prepare, adapt, deploy, enable, fix, minded 反義:unprepared
burn [b?n] 詞頻1 詞根: br-
vt.& vi.& link-v. (使)燃燒; vt.& vi. 使用某物為燃料;燒毀;燒壞;燒傷; n. 燒傷,燒痕;
?? 筆友(bu)的肉(r)幾乎(n)被 燒傷了
"The fire was allowed to burn unchecked."
大火肆虐,不受控制。
近義:parch, scorch, sear, singe, smoulder, swelter 反義:ice, nip, refrigerate, chill, congeal, cool

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