2. It is well known that an
imprecisely magnetised ferrite ring is very susceptible to vibrations and quickly loses effectiveness.

人们都知道,一个未准确磁化的纯铁环引起振动并会很快失去作用。
3. words like many, often, soon, which are also quantifiable but denote not so much a condition of uncertainty as a quantity
imprecisely known;

很多、经常、很快之类的词表示的是模糊的状况倒不如说表达的是知道得不够确切的数量;