All this was comparatively slow until, with the coming of science, the tempo was suddenly raised.
所有这些发展都比较缓慢，而随着科学的到来，增长的速度才突然加快。
新概念英语第四册
Lesson 22 Knowledge and progress
📚 句中词汇解析
从本句中提取的重要词汇
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."
突然他发觉自己醒了过来，而且高度警觉。
近义：impromptu, inadvertently, abruptly, offhand, overnight, sharply
反义：progressively, slowly, sparingly, stingily, inchmeal, consecutively
n. 科学;技术，知识;学科;理科;
💡 sci知道+ence名词后缀 → 科学；学问
"a degree in computer science"
计算机科学学位
adv. 对比地;相对地;比较地;有点;
"The unit is comparatively easy to install and cheap to operate."
这种设备比较容易安装而且用起来便宜。
近义：relatively
adj. 慢的;迟钝的;温和的;慢于…的;
adv. 慢慢地;缓慢地;
vt.& vi. （使）缓行，（使）减速;
vi. 变慢;变萧条;
vt. 放慢;阻碍;
💡 速度(s)低(low)即 慢
"an agonizingly slow process"
极其缓慢的过程
近义：brake, decelerate, lagging, leisurely, phlegmatic, poky
反义：speed, hasten, quick, rapid, smart, spanking
prep. 到…为止;在…以前;
conj. 到…为止，在…以前;直到…才;
"I don't want to make an accusation until I have some proof."
我要有一些证据以后才提出控告。
近义：till, to, unto