explicit 指清楚明白，毫不含糊其辞，因而无任何理解困难。
definite 指对所提到的事的范围及其细节毫无疑问，含有明确和确定界限的意味。
specific 强调内容明确，毫不抽象、笼统。
express 语气较强，较正式，指不但清楚明确，而且含有直截了当和有力等的意思。
参考例句
1. to express an idea clearly 清楚地讲述(或表达)一个想法
2. Flowers express feelings in the best way . 鲜花表达感情的最好的方法。
3. Songs on The Rising also express anger about the attacks. 《上升》里的歌还表达了对恐怖袭击的愤怒。
英英解释
n.
1. rapid transport of goods
2. mail that is distributed by a rapid and efficient system
3. public transport consisting of a fast train or bus that makes only a few scheduled stops v.
1. give expression to
2. articulate; either verbally or with a cry, shout, or noise
3. indicate through a symbol, formula, etc.
4. serve as a means for expressing something
5. manifest the effects of (a gene or genetic trait)
6. obtain from a substance, as by mechanical action
7. send by rapid transport or special messenger service adj.
1. not tacit or implied
2. without unnecessary stops adv.
1. by express
