名词 expression:

1. the feelings expressed on a person's face

2. expression without words

3. the communication (in speech or writing) of your beliefs or opinions

4. a word or phrase that particular people use in particular situations

5. the style of expressing yourself

6. a group of symbols that make a mathematical statement

7. (genetics) the process of expressing a gene

8. a group of words that form a constituent of a sentence and are considered as a single unit

9. the act of forcing something out by squeezing or pressing

expressionn.表情；表示；表达；词句；措辞；表现；挤压expression art表现艺术expression word语气词expression tool表现工具expression roll压辊expression form表现形式expression site表达位点expression turn表情转变expression tree表达树expression list表达式列表expressionisticadj.表现主义的；有表现派作风的

1. The expressions developed are based on Stoker's law.
   各种展开的计算公式是根据斯托克斯定律推导出的。
2. Write a program that uses stack postponement to evaluate the following expressions.
   用一个堆栈后进先出的程序来求得下面的公式。