rigid, strict, rigorous

形容詞 rigorous:

1. rigidly accurate; allowing no deviation from a standard
   同義詞：strict
2. demanding strict attention to rules and procedures
   同義詞：stringent, tight

1. An instance of rigorous or excessive adherence to recognized forms.
   形式主義的實例嚴格或過分地依據(jù)規(guī)定形式的實例
2. He makes a rigorous study of the plant in the area.
   他對該地的植物進行了慎密的研究。
3. Rigorous or ceremonious adherence to established forms, rules, or customs.
   拘泥形式遵照或順從已被確認的形式、規(guī)則或習(xí)俗
4. Now her teachers corps, called Teach for American is off and running. After a rigorous competition,500 recent college graduates won places out of a field of2,500 applicants, proving Ms.Kopp's theory that making the corps selective would enhance its appeal to college students.
   現(xiàn)在她的教師工作團——名為教師報國團——已迅速展開工作。經(jīng)過一番激烈競爭之后，2500名申請人中，500名剛從大學(xué)畢業(yè)的被錄取。證明了柯普女士的理論：工作團從嚴錄取將可在大學(xué)生中增加號召力。

rig.or.ous

adj.（形容詞）
Characterized by or acting with rigor:
嚴厲的，嚴格的：以嚴格為特點的，或嚴格行動的：
例句：
a rigorous program to restore physical fitness.
恢復(fù)身體健康的嚴格計劃

Full of rigors; harsh:
嚴峻的，嚴酷的：充滿困難的；艱苦的：
例句：
a rigorous climate.
嚴酷的氣候

Rigidly accurate; precise.See Synonyms at burdensome
嚴密的，精確的：非常嚴格準確的；精確的參見 burdensome

【引伸】
rig.orously
adv.（副詞）
rig.orousness
n.（名詞）