momentous
adj.极重要的(important, critical)
motif
n.主题(theme, subject)；主旨
The composer's symphony had an obvious waltz motif.
作曲家的交响曲有一个明显的华尔兹主题。
optimum
adj.最优的(best)
Under optimum conditions, these cultivated grass grows best.
在最佳条件下，这些栽培的草长得最好。
pivotal
adj.关键的
Chairman is the pivotal figure among the managing board.
董事长是管理委员会中举足轻重的人物。
predominantly
adv.占主导地位地，显著地(primarily, chiefly,principally)
In this company, employees are predominantly white, which is a sign of racial discrimination against the colored people.
在这家公司，雇员主要是白人，这是对有色人种的种族歧视。
predominate
vt.占优势，支配(prevail)
Cheap and inferior commodities often predominate the morning market.
便宜和劣质商品经常在早市占据主导地位。
preference
n.优先；优先权(inclination, privilege)
The king showed preference to his eldest son.
国王偏爱长子。
primarily
adv.首先，主要地(chiefly, mainly, principally)
principal
adj.重要的(main, chief, central)
significant
adj.有意义的；重要的(important)
sole
adj.唯一的(only, mere, exclusive)
sum
n.要点
superb
adj.极佳的；卓越的
tenor
n.要旨，要义(nature)
The tenor of this speech is to pursue a noble life.
这次演讲的宗旨是追求高尚的人生。
vital
adj.极重要的(important，crucial, essential)
It is absolutely vital that food supplies should be maintained at any cost.
要不惜一切代价维持粮食供应，这是至关重要的。