新概念英语第二册80-03

【课文讲解】

spend some time doing sth

lifetime : 毕生精力

用不定式做目的状语: to abserve a new... 仔细观察,一般科学家用 “observe”

which he later named Kituro = He later named the volcano Kituro. (the volcano=which)

close to : 离......很近

for long＝for a long time

notice that + 宾语从句

notice sth

notice sb do/doing : 注意到某人做某事/正在做某事

notice that: 文中可改为—He notice a river of liquid rock coming towards him.

river of...:...形成的河流 / river of soil and stone 泥石流 / river of blood 血流成河

threaten to : 有迹象表明

the mouth of Kituro 火山口

so that : 以便于(目的状语从句),一定含有情态动词

take a risk of/at a risk of : 冒险

risk sth＝risk losing sth : 冒着失去......的危险