Colorful stroked heart shapes on a black background.
心線藝術的心臟增強
16:10 Ratio、Abstract、Background、Colorful、Couple、Heart、Hearts , 、Line Art、Love、Passion、Rainbow、Relationship、remix 227014、Romance、Spectrum、Wallpaper、Widescreen
16:10比率、抽象、背景、華美、一對、心、心，、線條藝術、愛、情、彩虹、關係、混音227014、浪漫、光譜、牆紙、寬屏
資料來源：openclipart ( https://openclipart.org/ )

Cloud Icon in red
大紅雲
cloud、EOS、nube、red、roja、rojo
雲、EOS、雲、紅色、天、紅
資料來源：openclipart ( https://openclipart.org/ )

Pictogram railroad station Belgium
火車站
icon、pictogram、railroad station、railway、train
圖標、圖標、火車站、鐵路、培養
資料來源：openclipart ( https://openclipart.org/ )

This image was adapted from a picture posted to publicdomainq.net. All of the images on these sites are in the public domain i.e. CC0. This site is only in Japanese but can be easily navigated with Google Translate.
可愛的大象（＃1）
cactus-icon、cute、elephant、happy、trunk、Yes
仙人掌圖標、可愛、象、快樂、樹幹、是
資料來源：openclipart ( https://openclipart.org/ )

The "Sun in Splendour" is a heraldry term for this creepy face on a sun (like telly tubbies) thing, incidentally you can see something like it on the flag of Argentina and Uruguay. (This is based on a public domain Polish shield design.)
太陽在輝煌
cartoon、face、heraldry、splendor、splendour、sun、sunny、sunshine
動畫片、面對、紋章、輝、輝、孫、晴朗、陽光
資料來源：openclipart ( https://openclipart.org/ )

Flipflops, sandalias.
人字拖22
beach、fashion、feet、Flipflops、sandalias、summer、vacations.
海灘、時尚、腳、人字拖、涼鞋、夏季、假期。
資料來源：openclipart ( https://openclipart.org/ )

From a drawing in 'Comic History of Greece from the earliest times to the death of Alexander the Great', Charles Snyder, 1898. Originally entitled 'Theseus on his way to the Minotaur'. Removed the design on the sail to make it more general.
古希臘船
boat、Greece、Greek、History、sea、Seefahrt、ship、voyage
船、希臘、希臘語、歷史、海、航海、船、旅遊
資料來源：openclipart ( https://openclipart.org/ )

Create your own pizza with muschrooms, peperoni, and oregano!
創建自己的披薩！
challenge completed、createyourown、dinner、food、howto、italy、make your own、mushroom、oregano、peperoni、pizza、remix 203606、request completed、stuffilike
挑戰完成、創造你自己的、晚餐、餐飲、如何、意大利、做你自己的、蘑菇、牛至、意大利辣味香腸、比薩、混音203606、請求已完成、stuffilike
資料來源：openclipart ( https://openclipart.org/ )

I don't know if it is trying to make us feel guilty for supplying guns to kill others or trying to make us proud. I suppose it depends on your view.
破步槍
battle、broken、fight、frameframe、propaganda、rifle、solider、war、World war 1、WW1、WWI
戰鬥、破碎、鬥爭、逐幀、宣傳、步槍、固體、戰爭、第一次世界大戰、WW1、WWI
資料來源：openclipart ( https://openclipart.org/ )

Colored tangram puzzle solution
七巧板
answer、people、pussle、shape、tangram
回答、人、拼圖，、形狀、七巧板
資料來源：openclipart ( https://openclipart.org/ )