New words：

stock /stɒk/
n. 库存；存货；现货
n. 股票；股份
n. 家畜；牲畜
v. 储备；囤积；备货

详细词源拆解：

源自古英语 stoc，本义指树干、根茎、根基，后引申为储存起来的物品、存货；
由 “囤积货物” 延伸出股票、库存、常备等多层含义，是词义跨度很大的高频多义词。

词汇家族：

stock → stockpile（n. 大量库存；囤积物资）
stock → stocking（n. 长筒袜）
stock → stockholder（n. 股东）
stock → stockist（n. 经销商；存货商）

必记高频搭配

in stock 有现货；有库存

We are glad to know that all the goods we need are rich in stock.

out of stock 缺货；脱销；售完

The popular story books were all out of stock after the weekend sale.

stock up on sth 囤积；大量储备某物

Many families will stock up on food and drinks before the coming festival.

stock market 股票市场；股市

Many people want to invest in the stock market for more income.

a large stock of 大量的库存；大批储备

The big supermarket keeps a large stock of fresh fruit every single day.

关键使用提醒

1.in stock / out of stock 是初中完形、阅读最高频固定短语，必须熟记。

2.作动词表示 “储备” 常用搭配 stock up on sth，不可直接单独接名词乱用。

3.名词含义多，初中优先掌握：库存、现货、囤积；股票含义仅作了解即可。

复数形式 stocks：可指各类库存货物、股票；
特殊含义长筒袜固定为 stockings。

New words：

convenience [kənˈviːniəns] n. 方便；便利；适宜；便利的事物（或设施）
inconvenience [ˌɪnkənˈviniəns] n. 不便；麻烦；困难；带来不便者

必记高频搭配

for convenience 为了方便起见

We keep some extra books in the classroom for convenience.

at one’s convenience 在某人方便的时候

You can hand in your homework at your convenience.

convenience store 便利店

There is a convenience store near our school.

offer convenience to sb 给某人提供便利

Shared bikes offer great convenience to people in cities.

the convenience of doing sth 做某事的便利

We all enjoy the convenience of online shopping.

关键使用提醒

1. convenience 作 “方便” 讲时不可数；作 “设施” 讲时可数

   The hotel has all modern conveniences.

2. 高频固定句型：

   at one’s convenience = 在某人方便时
   You can visit the museum at your convenience.

3. 反义词：inconvenience（不便）

   We apologize for any inconvenience we have caused.
   对于造成的任何不便，我们深表歉意。

New words：

convenient [kənˈviniənt] adj.便利的；方便的；省事的；实用的

词汇家族：

convenient → conveniently（adv. 方便地；便利地）
convenient → convenience（n. 方便；便利；便利设施）
convenience → convenience store（便利店）
convenient → inconvenient（adj. 不方便的）

必记高频搭配

be convenient for sb 对某人来说很方便

Online classes are convenient for students who live far away from school.

be convenient for sth 对某事便利；靠近某处

Our new house is convenient for the bus stop and the supermarket.

It is convenient to do sth 做某事很方便

It is very convenient to pay by mobile phone in our daily life.

关键使用提醒

1.千万不要说 I am convenient. 因为这个词不是做主观描述的
正确用法：It is convenient for me.（对我来说方便）
误：I am convenient to meet you after school.
正：It is convenient for me to meet you after school.
放学后见你对我来说很方便。

2.常用句型（考试必背）：
It is convenient (for sb) to do sth.
It is convenient for us to finish the task together.
我们一起完成这项任务会很方便。

3.反义词：inconvenient（不方便的）
It is inconvenient to go out without an umbrella on rainy days.
下雨天出门不带伞很不方便。

New words：

thermal /ˈθɜːml/
adj. 保暖的；防寒的（最常用）
adj. 热的；热量的；温度的
n. 上升暖气流；保暖内衣

必记高频搭配

thermal clothes /thermal wear 保暖衣物；保暖内衣

People usually wear thermal clothes to keep warm in cold winter.

thermal spring 温泉

Many tourists go to the thermal spring to relax on holidays.

thermal energy 热能

We can get thermal energy from the sun and use it for daily life.

thermal 保暖内衣，常用复数 thermals

Many students wear thermals under their school uniforms in winter.

New words：

kettle /ˈketl/　n. 水壶；烧水壶；电水壶
thermos /ˈθɜːməs/ n.热水瓶；保温瓶；暖水瓶；保温杯 复数形式：thermoses

详细词源拆解：

源自希腊语 therme = heat 热、温度，最初是一个品牌名，因为太常用，慢慢变成了通用名词，表示保温瓶、保温杯。

前缀 therm- 都和 “热、温度” 有关，是这个词的核心词根。

词汇家族

thermos → thermos bottle（保温瓶）
thermos → thermos flask（暖水瓶）
therm-（热）→ thermometer（温度计）
therm-（热）→ thermal（热的；保暖的）

Sample Sentences

Please boil the kettle and make a cup of tea for our guest.
My mother bought a new electric kettle to make boiling water easier.

It is very convenient to take a thermos when we go out for a picnic.
He poured a kettle of hot water into the thermos before going to school.

convenient [kənˈviniənt] adj.便利的；方便的；省事的；实用的