Across
- 2. short written record to aid the memory
- 5. say or do again
- 7. a person receiving medical treatment（医学治疗）
- 8. the chemical composition(成分） and properties（特性） of a substance（物质） or object;
- 13. way a person speaks the words of a language
- 14. not silently
- 15. a book giving instruction in a subject
Down
- 1. sth kept hidden or known only to a few people
- 3. showing of feelings, opinions
- 4. sample
- 6. (the study or use of) the rules by which words change their forms and are combined into sentences
- 9. informal talk in which people exchange news, feelings, and thoughts
- 10. make or become larger in amount or number
- 11. person who takes part in an activity with another or others
- 12. find or learn out
- 13. make the sound of letter or word