The clouds had come down so suddenly we had no warning.
烏云突然出現，我們絲毫沒有覺察。
高三英語課文
Unit 23 The find of the century
?? 句中詞匯解析
從本句中提取的重要詞匯
adv. 意外地，忽然地;奄;勃;霍然;
?? sudden突然的 + ly ...地 → adv.突然地
"Suddenly he found himself awake and fully alert."
突然他發覺自己醒了過來，而且高度警覺。
近義：impromptu, inadvertently, abruptly, offhand, overnight, sharply
反義：progressively, slowly, sparingly, stingily, inchmeal, consecutively
n. 警告;征候，預兆;前車之鑒;
adj. 警告的;告誡的;引以為戒的;
v. 警告( warn的現在分詞);提醒;告誡;預先通知;
?? warn警告+ing名詞后綴 → 警告
"a coded warning of a bomb at the airport"
告知機場有炸彈的密碼警報
近義：notice, notification, prevention, word, caution, cautioning
vi. 來;開始;出現;發生;
vt. 做;裝扮…的樣子;將滿（…歲）;
int. 嗨！;
"The time has come for action if these beautiful animals are to survive."
若要使這些美麗的動物能生存下去，現在就要行動起來。
近義：impersonate, perform, personify, portray, represent, stage
反義：leave, absquatulate, retire, retreat, scat, split
adv. （坐、倒、躺）下;向下;（表示范圍或順序的限度）下至;
prep. （從高處）向下;（表示位置）在…的下方;（表示方向）沿著…向下;（表示時間）自…以來;
adj. 向下的;沮喪的;計算機或計算機系統停機;（以…）落后于對手的;
n. （鳥的）絨羽;絨毛;軟毛;汗毛;
vt. 放下;（尤指大口或快速地）喝下;使摔倒;擊落（敵機等）;
vi. [常用于祈使句中]下去;下來;臥倒;下降;
?? 音“鐺”，鐺的一聲向下 落
"Calm down! Don't get so agitated."
冷靜下來！別那么激動。
近義：lint, fluff, fuzz, ingurgitate, quaff, swallow
反義：above, overhead, upstairs, upward, upwards, aloft