■ dosage 与 dose

dosage 是经常服用某一药物的规定剂量，dose 则是具体某次服用的剂量。

• Last night, before going to bed, I took a large dose (*dosage) of castor oil.我昨夜临睡前服用了大剂量的蓖麻油。
• She took twice the prescribed dose (*dosage) of sleeping tablets.她服用了双倍于处方剂量的安眠药（虽然是 prescribed，但仍然是具体一次而不是普遍的剂量）。

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• enter into
• enter 与 enter into
• entitle
• entrance
• envious
• envy
• envy, envious 与 jealous, jealousy
• epidemic
• equivalent
• -er
• -er
• -er 与 -or
• escape
• especial
• especial 与 special
• espouse
• -est
• estimate
• estimate 与 estimation
• estimation
• etc
• even
• event
• -ever