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--- mywiki:english:eng202109 [2021/09/19 21:48] – shaoguoh
+++ mywiki:english:eng202109 [2022/04/02 17:28] (current) – external edit 127.0.0.1
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+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
+  * **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
+  * **cranny**: a small, narrow space or opening.缝隙
      * bugs and spiders conceal themselves in crannies of the bark
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 **Lumber** prices earlier this year had climbed by as much as 316% since the start of 2020
-  * Lumber:
+  * 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
+  * **roofers**: A person who constructs or repairs roofs
-  * glaziers /ˈɡleɪzɪə/: A person whose profession is fitting glass into windows and doors.
+  * **glaziers** /ˈɡleɪzɪə/: A person whose profession is fitting glass into windows and doors.
 the day is **shot**: wasted
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 **perk**: become or make more cheerful, lively, or interesting.
-  * she'd been depressed, but she seemed to **perk** up last week
+  * 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.