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；

New words：

marine [məˈrin] adj. 海的；海产的；海生的；海船的

详细词源拆解：

源自拉丁语 mare = 海洋；海
拉丁语形容词形式 marinus = 海洋的，与海相关的
进入法语后变为 marin
最终进入英语写作 marine
核心逻辑：与大海、海洋、海生有关的

词汇家族：

marine（海洋的）→ submarine（潜艇；海底的）→ mariner（水手）

必记高频搭配

marine organism 海洋生物；海洋有机体

Whales are large marine organisms.

marine environment 海洋环境

We must protect the marine environment.

marine pollution 海洋污染

Plastic waste causes serious marine pollution.

marine animals/plants 海洋动物 / 植物

Many marine animals are in danger.

New words：

organism [ˈɔrɡəˌnɪzəm] n. 生物；有机体；有机组织；

必记高频搭配

living organism 生物；活体生物

Every living organism needs water and air.

single-celled organism 单细胞生物

A bacterium is a single-celled organism.

marine organism 海洋生物

The sea is full of different marine organisms.

marine [məˈrin] adj. 海的；海产的；海生的；海船的

关键使用提醒：

organism 是可数名词，复数：organisms
常与 living, single-celled, marine, complex 连用
反义词：inorganic matter 无机物

New words：

organic [ɔrˈɡænɪk] adj. 有机的；不使用化肥的；绿色的；有机物的；器官的；

详细词源拆解：

来自希腊语 organon = 工具、器官、生命体的 “结构部件”
进入拉丁语 → organum
英语 organ (n. 器官；机构)
-ic 形容词后缀 → 表示 “与… 相关的、具有… 性质的”

整体逻辑：

→ 与器官、生物、生命体相关的
→ 引申为：生物的、有机的、自然生长的

inorganic [ˌɪnɔrˈɡænɪk] adj. 无机的；无生物的

必记高频搭配

organic food 有机食品

Organic food is healthier but more expensive.、

organic fertilizer 有机肥

Farmers use organic fertilizer to protect the soil.

inorganic fertilizer 无机肥；化肥

Too much inorganic fertilizer pollutes the soil.
Plants need both organic and inorganic nutrients.

中考常考话题：

环保、健康饮食、农业

作文高级表达：

普通：healthy vegetables
高级：organic vegetables

New words：

essence [ˈesns] n. 本质；精髓；精华
essentially [ɪˈsenʃəli] adv. 本质上；基本上；根本上

必记高频搭配

the essence of… …… 的本质 / …… 的精髓

We should understand the essence of the story.

in essence 本质上；实质上

The two methods are different in essence.

the essence of success 成功的要素

Diligence is the essence of success.

essentially the same 本质上相同

The two methods are essentially the same.

essentially different 本质上不同

Their ideas are essentially different.

essentially speaking 基本上来说

Essentially speaking, practice makes perfect.

关键使用提醒

essentially = basically / in essence，作文可互换升级

普通：Basically, they are right.
高级：Essentially, they are right.