What are **primary**, **secondary**, and **tertiary** sources ?

First to remove loose **membranes** from the outside of the beef knuckles. 主膜

  * **wedge** musule 楔形肌肉
  * **femur** musule：The bone of the thigh or upper hind limb, articulating at the hip and the knee.股骨
  * **gristle** layer 软骨层
  * **knuckle** heart 指关节

For a vegetable with lots of** nook and crannies** like broccoli or cauliflower, you need to make sure soak them in water 1 ~2 minutes to clean it.
  * **nook**: a corner or recess, especially one offering seclusion or security.角落
     * the nook beside the fire 
  * **cranny**: a small, narrow space or opening.缝隙
     * bugs and spiders conceal themselves in crannies of the bark

The reforms will help **unshackle** the telecoms sector: Release from shackles, chains, or other physical restraints.

**Lumber** prices earlier this year had climbed by as much as 316% since the start of 2020
  * Lumber: Timber sawn into rough planks or otherwise partly prepared, ie, **sawn wood products**.

  * The term '**timber**' is used to refer to the wood **at any stage** after the tree has been felled. 
  * 'Timbers' may refer specifically to timber beams or boards used in house building. In the United States and Canada, timber often refers to **felled trees**, and the term '**lumber**' is used to refer to **sawn wood products**

There aren’t enough **roofers**, **glaziers**, plumbers, electricians and other types of workers to fill the needs of the construction industry.
  * **roofers**: A person who constructs or repairs roofs
  * **glaziers** /ˈɡleɪzɪə/: A person whose profession is fitting glass into windows and doors.

the day is **shot**: wasted

**contrarian** /kənˈtrɛːrɪən/: a person who opposes or rejects popular opinion, especially in stock exchange dealing.
  * it has become fashionable to be a stock-market **contrarian**

Much of Intel Stock's valuation **discrepancy** with AMD's has to do with the company’s **anemic** growth and its many past missteps.
  * **discrepancy** /dɪsˈkrɛp(ə)nsi/: an illogical or surprising lack of compatibility or similarity between two or more facts.
     * "there's a discrepancy between your account and his"
  * **anemic** /əˈniːmɪk/: lacking in colour, spirit, or vitality.
     * an anaemic aspidistra stood in the grate


**perk**: become or make more cheerful, lively, or interesting.
  * she'd been depressed, but she seemed to **perk up** last week

**titanium** /tʌɪˈteɪnɪəm,tɪˈteɪnɪəm/: the chemical element of atomic number 22, a hard silver-grey metal of the transition series, used in strong, light, corrosion-resistant alloys.钛

I can **give a lift** home if you want to.