All this was comparatively slow until, with the coming of science, the tempo was suddenly raised.
所有這些發展都比較緩慢，而隨著科學的到來，增長的速度才突然加快。
新概念英語第四冊
Lesson 22 Knowledge and progress
?? 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. 科學;技術，知識;學科;理科;
?? sci知道+ence名詞后綴 → 科學；學問
"a degree in computer science"
計算機科學學位
adv. 對比地;相對地;比較地;有點;
"The unit is comparatively easy to install and cheap to operate."
這種設備比較容易安裝而且用起來便宜。
近義：relatively
adj. 慢的;遲鈍的;溫和的;慢于…的;
adv. 慢慢地;緩慢地;
vt.& vi. （使）緩行，（使）減速;
vi. 變慢;變蕭條;
vt. 放慢;阻礙;
?? 速度(s)低(low)即 慢
"an agonizingly slow process"
極其緩慢的過程
近義：brake, decelerate, lagging, leisurely, phlegmatic, poky
反義：speed, hasten, quick, rapid, smart, spanking
prep. 到…為止;在…以前;
conj. 到…為止，在…以前;直到…才;
"I don't want to make an accusation until I have some proof."
我要有一些證據以后才提出控告。
近義：till, to, unto