- 重点词汇
- 第三
third; tertiary; thirdly; 3rd; in the third place
- 心脏
heart; cardiac; ticker; heart-related; cardio-; cardiac-
- 保护
protect; secure; safeguard; conserve; preserve; shield; defend; guard; shelter; screen; protective; defensive; safeguarding; protection; defence; conservation; preservation; conservancy; wardship
- 研究
study; research; dig; investigate; follow; pursue; trace; work; explore; delve into; look into; do research on; look at; read up on; exploration; -ics