带ness后缀的单词5个

　　例句：

　　That purpose is alertness.

　　这个目的就是警惕。

　　They also increase alertness and energy.

　　它们也能提高机敏性和精力。

　　Alertness must be bred into every soldier.

　　警惕性必须渗透到每个战士的血管中去。

　　We look forward to greater mental alertness.

　　我们渴望突破精神上的限制。

　　And the body is made sensitive through alertness.

　　而身体因警觉而变得敏感。