New words：

efficiently [ɪ'fɪʃ(ə)ntli] adv.有效率地；有效地；效率高地井井有条地
inefficient [ˌɪnɪˈfɪʃ(ə)nt] adj.效率低的；能力差的；浪费的

必记高频搭配

work/study efficiently 高效地工作 / 学习
If you want to have more free time, you need to study efficiently.

use time/resource efficiently 高效利用时间 / 资源
We should use time efficiently in our daily life.

an inefficient method 低效的方法
This inefficient method wastes a lot of our time.

New words：

efficient /ɪˈfɪʃnt/ adj.效率高的；有功效的

必记高频搭配

1.修饰人 / 工作者：能胜任的、办事高效的

an efficient worker/employee 高效的员工

She is an efficient worker who always finishes tasks on time.

be efficient in (doing) sth（在做某事方面高效 / 干练）

She is efficient in organizing class activities.

be efficient at one’s work 工作效率高

He is very efficient at his work and rarely wastes time.

2.修饰物 / 工具 / 方法：高效的、节省资源的

an efficient machine/tool 高效的机器 / 工具

This new efficient machine can double the production speed.

an efficient method/way 高效的方法

We need to find an efficient method to solve this problem.

efficient energy/resource use 能源 / 资源的高效利用

Efficient energy use is good for environmental protection.

an efficient computer 运行流畅的电脑（口语高频，表 “高效运转的”）

3.修饰行为 / 过程：高效的、事半功倍的

efficient work/study 高效的工作 / 学习

Doing efficient study is more important than studying for a long time.

an efficient operation 高效的操作 / 运营

The hospital’s efficient operation saved many patients’ lives.

New words：

phenomenon [fəˈnɒmɪnən] n.现象
phenomena [fəˈnɒmɪnə] phenomenon的复数形式

必记高频搭配

a physical/chemical phenomenon 物理 / 化学现象

Boiling is a common physical phenomenon in daily life.

a natural phenomenon 自然现象

Scientists are studying many natural phenomena like lightning and thunder.

a social phenomenon 社会现象

Online shopping has become a popular social phenomenon in recent years.

a common/unusual phenomenon 常见的 / 罕见的现象

It’s a common phenomenon that students feel nervous before exams.

social and cultural phenomena 社会文化现象

New words：

conduction [kən'dʌkʃn] n.（热或电等能量的）传导
conductor [kənˈdʌktər] n.指挥家；导体；售票员；列车长

必记高频搭配

heat/electric conduction 热传导 / 电传导

Heat conduction is a common physical phenomenon.

the conduction of sound 声音的传播 / 传导

Water is good for the conduction of sound.

a music conductor 音乐指挥家

Her dream is to become a famous music conductor in the future.

a good/bad conductor 良导体 / 不良导体

Plastic is a bad conductor of electricity.

a bus/train conductor 公交 / 火车售票员

The bus conductor asked me to buy a ticket when I got on the bus.

phenomenon [fəˈnɒmɪnən] n.现象

New words：

conduct[ˈkɑnˌdʌkt] v.实施；执行；表现；引导

必记高频搭配

核心义 1 ：做；实施；进行

conduct an experiment 做实验

We need to conduct an experiment to test the new theory.

conduct a survey/research 做调查 / 开展研究

The students conducted a survey about students’ reading habits.

conduct a study 开展研究

Scientists conducted a study on air pollution in big cities.

conduct an activity 组织活动

Our class will conduct a volunteer activity this weekend.

核心义 2 ：引导；带领；指挥

conduct sb around sp 带领某人参观某地

The guide conducted us around the history museum.

conduct a team 带领团队

He is a good manager who can conduct a team efficiently.

efficiently [ɪ'fɪʃ(ə)ntli] adv.有效率地；有效地；效率高地井井有条地