a thick piece of soft material that is used, for example, for cleaning or protecting something or for holding liquid （吸收液体、保洁或保护用的）软垫，护垫，垫状物 medicated cleansing pads for sensitive skin 敏感皮肤药物清洗棉 sanitary pads (= that a woman uses during her period) 卫生棉垫
Oxford Collocations Dictionaryadjective- thick
- adhesive
- cotton
- …
a number of pieces of paper for writing or drawing on, that are fastened together at one edge 便笺本；拍纸簿 a sketch/writing pad 速写簿；拍纸簿 She always kept a pad and pencil by the phone. 她总是在电话旁放一个便笺簿和一支铅笔。 She doodled on a pad as she spoke. 她一边说话一边在拍纸簿上乱涂乱画。
Oxford Collocations Dictionaryadjective- memo
- note
- scratch
- …
- on a/the pad
the soft part under the foot of a cat, dog, etc. 爪垫；肉掌 A cat detects vibrations through the pads of its feet. 猫通过脚垫检测振动。
a small piece of rough material used for cleaning pans, surfaces, etc. 百洁布，菜瓜布（刷锅等的小块粗糙材料） a scouring pad 刷洗用的金属丝球
Oxford Collocations Dictionaryadjective- thick
- adhesive
- cotton
- …
a flat surface where a spacecraft or a helicopter takes off and lands 发射台；停机坪 helicopter landing pads 直升机停机坪 Two booster rockets will power the shuttle off the pad. 两枚助推火箭将为航天飞机提供动力。
- [usually plural]
a piece of thick material that you wear in some sports, for example football and cricket, to protect parts of your body （运动用）防护垫（如护腿、护肘等） 
knee pads 护膝
the large flat leaf of some water plants, especially the water lily 浮叶（尤见于睡莲） floating lily pads 睡莲的浮叶
- [usually singular] (informal)
the place where somebody lives, especially a flat 住所；（尤指）公寓 He moved back into his old bachelor pad. 他搬回了他以前的单身公寓。
of soft material软材料
of paper纸张
of animal’s foot动物的足
for cleaning用于清洗
for spacecraft/helicopter航天器；直升机
for protection用于防护
of water plants水生植物
flat/apartment公寓
Word Originnoun mid 16th cent. (in the sense ‘bundle of straw to lie on’): the senses may not be of common origin; the meaning ‘underpart of an animal's foot’ is perhaps related to Low German pad ‘sole of the foot’; the history remains obscure.