1、critical

极重要的;关键的

The incident happened at a critical point in the campaign.

该事件发生在竞选活动的关键时期。

Environmentalists say a critical factor in the city's pollution is its population.

环境保护主义者说造成该城市污染问题的一个关键因素是其人口数量。

(局势)严重的，有危险的

The German authorities are considering an airlift if the situation becomes critical.

如果局势变得危急，德国当局将考虑实施空运。

Its day-to-day finances are in a critical state.

其日常财务状况十分糟糕。

批评的;挑剔的

His report is highly critical of the trial judge.

他在报告中对主审法官有颇多批评。

a few dozen intellectuals who've been critical of the regime.

几十名一直批判该政权的知识分子

2、precious

宝贵的；珍贵的；贵重的

After four months in foreign parts, every hour at home was precious.

在国外呆了4个月后，在家的每一刻都是宝贵的。

A family break allows you to spend precious time together.

家庭度假会让你们一起度过宝贵的时光。

值得珍视的；可贵的；重要的

Her family's support is particularly precious to Josie.

家庭的支持对乔茜来说尤为可贵。

Mary left her most precious possession a small bookcase to her niece.

玛丽把她最珍视的财产—一个小书架，留给了她的侄女。