Black-and-white drawing of a young man's face.
年輕人
black、boy、cartoon、Cartoon People、face、line art、man、monochrome、people、people avatars、person、portrait、Portraits
黑色、男孩、動畫片、卡通人物、面對、線條藝術、人、單色、人、人頭像、人、肖像、肖像
資料來源：openclipart ( https://openclipart.org/ )

Practical Physics for Nurses by Minnie Goodnow, R.N. 1919
牙科考試
dental、dentist、Dentures、exam、externalsource、Healthcare、medicine、patient、Smile、Teeth、Working Life
牙齒、牙醫、假牙、考試、外部源、衛生保健、醫學、患者、微笑、牙、工作生涯
資料來源：openclipart ( https://openclipart.org/ )

I needed a quick and easy way to insert rough-looking lines into a document, so I created this "pencil sketch" line.
粗略的草圖線
charcoal、distressed、line、pencil、rough、sketch、vintage
木炭、苦惱、線、鉛筆、粗、草圖、釀酒
資料來源：openclipart ( https://openclipart.org/ )

A glass of water by Andrew Fitzsimon. Etiquette Icon set. From 0.18 OCAL database.
玻璃
drink、etiquette、glass、icon、water
喝、禮儀、玻璃、圖標、水
資料來源：openclipart ( https://openclipart.org/ )

Iconographic coffee cup, to hold your favorite $5 drink
紙咖啡杯
coffee cup、paper cup、starbucks、Tradetools
咖啡杯、紙杯、星巴克、繁體工具
資料來源：openclipart ( https://openclipart.org/ )

A slight rework...
城堡與國旗
Batiments、castle、fantasy、house、medieval
建築行業、城堡、幻想、屋、中世紀
資料來源：openclipart ( https://openclipart.org/ )

an image from the US government EPA "Sunwise" program. I converted it from PDF format. the source link is here - http://www.epa.gov/sunwise/doc/poster.pdf
運動型男孩大綱
beach、cartoon、coloring book、epa、epa sunwise、girl、line art、outline、summer、towel
海灘、動畫片、填色本、EPA、epa sunwise、女孩、線條藝術、大綱、夏季、毛巾
資料來源：openclipart ( https://openclipart.org/ )

an instrument that measures the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute
轉速表
motorsports、motor sports、racing、rev counter、revolution-counter、RPM、rpm gauge、speed、tach、tachometer
賽車、賽車運動、賽跑、吼tsounter、革命櫃檯、RPM、轉速表、速度、轉速表、轉速表
資料來源：openclipart ( https://openclipart.org/ )

Green broccoli
西蘭花
broccoli、Food、food、green、healthy、Intersyllabic /k/、vegetable
西蘭花、餐飲、餐飲、綠色、健康、田間/ k /、蔬菜
資料來源：openclipart ( https://openclipart.org/ )

A building.
建立
building
建造
資料來源：openclipart ( https://openclipart.org/ )