Strictly adhering to rule.

严守规律的。

Grave in manner; forbidding on appearance.

庄重的；严厉的。

Strict; harsh.

严正的；严酷的。

Extremely plain.

非常朴素的。

Extreme; sharp; distressing.

极端的；激烈的；困苦的。

Hard to bear or undergo; trying.

艰难的；难捱的。

Critical, dangerous, as an illness.

危急的；危险的(如疾病)。