【previously音标】 英[ˈpriːviəsli] 美[ˈpriːviəsli]
【单词释义】 previously是什么意思：
adv.以前地，先前地；仓促
[单词分级] 大学英语四级词汇
【关联词/派生词】
preview n.预映;预演;预展 vt.预映；预先观看；概述
previous adj.先前的；以前的
prevision n.预知，先见
【近义词解析】
◇ 以前
ago (adv. 以前)：指从现在起往前推算一段时间，通常和一般过去时的动词连用。
before (adv. 先前，以前)：指过去某时间之前的时间或泛指以前，通常与动词的现在完成时连用，有时也可与动词的过去完成时或一般过去时连用，也可用于具体的一段时间；在间接引语中用 before 而不用 ago。
formerly ([六级]adv. 以前，从前)：泛指以前，有时常用于对比。He was formerly a worker, but now he is a manager of a shop.
previously ([六级]adv. 以前，先前)：与 before 用法相同，但更加正式。
【单词例句】
◇ Acne was previously thought to come from lack of normal shedding of the skin cells that line the sebaceous (oil gland) follicle. This was thought to lead to thickened skin and the formation of small comedones (black and white heads).
原先认为痘痘源于毛囊皮脂腺周围的皮肤细胞未能正常脱落。这会导致皮肤增厚，形成黑头和白头（粉刺）。
---- Should we be popping pimples?
◇ Previously people have been admitted to hospital suffering from burst eardrums, ruptured blood vessels in the eyes, damaged facial nerves, pulled muscles and even cracked ribs from trying to contain the huge force.
先前曾出现过因试图把喷嚏憋回去而导致鼓膜破裂、眼睛血管破裂、面部神经受损、肌肉拉伤甚至肋骨断裂的病例。
---- Don't hold in a sneeze, It could be the death of you
◇ The huge distance between the source of the explosion and the Earth suggests gamma-ray bursts are up to 10 times larger than previously thought,said Jonathan Katz,professor of physics at Washington University in St Louis.
圣劳伦斯华盛顿大学的物理教授Jonathan Katz认为：从地球到爆炸源如此远的距离可以知道，伽马射线的爆炸要比我们所看到的要大十倍。
---- The Big Bang
◇ Previously, only the male peacock's habitat in the mountains every time, always a good one can first choose a place to hide the tail, and then again placed in other parts of the body.
早先，这只雄孔雀每逢在山里栖息的时候，总是要首先选择好一个能掩藏尾羽的地方，然后再来安置身体的其他部位。
---- The Peacock