New words:

emission [iˈmiʃ(ə)n] n.排放;辐射;排放物;


必记高频搭配

carbon emissions 碳排放

We must reduce carbon emissions to protect the earth.

harmful gas emissions 有害废气排放

Factories should control harmful gas emissions.

reduce / cut emissions 减少排放

More people choose buses to cut emissions.

New words:

emit [ɪˈmɪt] v.发出;散发;排放(气体、光、热、声音等)

详细词源拆解:

前缀 e- = ex-:来自拉丁语 ex-,表示 out 向外、出来
词根 mit:来自拉丁语 mittere,表示 send 送、投掷、派遣

组合逻辑:

→ e- (out) + mit (send)
→ send out 送出去、排出去、释放出来
→ 引申为:排放;散发;发出(光、热、气、声)

词汇家族:

emit(v. 排放)→ emission(n. 排放)→ mission(派遣)→ transmit(传输)

必记高频搭配

emit harmful gases 排放有害气体

Factories emit harmful gases into the air.

emit smoke 冒烟

The car emits black smoke.

emit light / heat 发光 / 发热

The sun emits light and heat.

emit carbon dioxide 排放二氧化碳

Burning fuels emits carbon dioxide.

fuels [ˈfjuːəl] n.燃料;燃油;

New words:

encompass [ɪnˈkʌmpəs] v.包含;包围;围绕;围住

前缀 en- = 使… 进入、使… 处于(来自拉丁语 in-,表 “使动”)

必记高频搭配

encompass many areas 涵盖许多领域

The subject encompasses history, art and science.

encompass all kinds of 包含各种各样的

The report encompasses all kinds of examples.

be encompassed by 被…… 包围

The small village is encompassed by green hills.

关键使用提醒:

encompass = include / cover,作文里替换超加分

多用于抽象范围:计划、研究、主题、领域等

New words:

compass [ˈkʌmpəs] n.罗盘;指南针;圆规;

详细词源拆解:

前缀 com- = 一起、共同、完全(来自拉丁语 com-)
词根 pass = 走、步、通过(来自拉丁语 passus 步幅、步伐)
原始含义:一步步环绕、围绕而行 → 包围、环绕

后来引申:

能绕圈画圆的工具 → 圆规
能指示方向、绕定方位的工具 → 指南针、罗盘

整体逻辑:

→ com- (一起) + pass (迈步、伸展)
向四周伸展、环绕 → 圆规 → 指南针 / 罗盘

必记高频搭配

We need a compass to draw a perfect circle.
Without a compass, it is easy to get lost in the forest.
Long ago, sailors used a compass to sail across the sea.


New words:

mariner [ˈmærɪnə(r)] n.水手;海员
submarine [ˈsʌbməˌrin] n.潜艇 adj.海底的


必记高频搭配

the mariner's compass 航海罗盘

The compass is very important for a mariner.

a nuclear submarine 核潜艇

A nuclear submarine can stay under water for a long time.

submarine volcano 海底火山

There are many submarine volcanoes in the ocean

compass[ˈkʌmpəs] n.罗盘;指南针;圆规;