(informal)very excited and giving one's full attention to something
(非正式)十分兴奋的，兴奋得坐不住的；全神贯注的
(especially of an unpleasantly harsh sound) cause someone to feel intense discomfort or irritation
（尤指刺耳声音）使人觉得牙根发痒，使人觉得十分刺耳
a grating that set her teeth on edge.
让她觉得牙根发痒的刺耳磨擦声。
reduce the intensity or effect of (something unpleasant or severe)
使钝；削弱；挫…的锐气
the tablets will take the edge off the pain.
这些药片可以减轻疼痛。
To surpass or beat by a small margin
排挤掉：以微弱优势超过或胜过
The downhill racer edged her opponent out on the middle stretch.
下坡滑雪赛的选手将她的对手慢慢挤出中央跑道
Highly tense or nervous; irritable.
紧张的：高度紧张或不安的；易怒的
In a precarious position.
边界状态：处于不稳定的状态
In a state of keen excitement, as from danger or risk
激动，兴奋：处于高度兴奋状态，如由危险或冒险引起的
“the excitement of combat, of living on the edge”(&b{Nelson DeMille})
“由一触即发的战斗引起的激动”(&b{纳尔逊·德米耶})