The 4-inch-diameter plastic balls block sunlight from penetrating the 175-acre surface of the reservoir.

这些塑料球直径为4英寸，覆盖了水库175英亩（约71公顷）的水面，使其避免太阳光照射。

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Find some glass or plastic balls (enough for everyone in your family). Using a metallic marker write your name across the front and the year on the back.

你可以找一些玻璃球或塑料球(够每个家庭成员使用即可)，再找一只记号笔把每个人的名字写在球的正面，背面写上年份，然后再画一个简笔树或雪花就完成了。

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Plastic buckets and balls roll around in the breeze.

塑料小桶和沙滩球在海风的吹拂下四处滚动。

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The card's coating is embedded with thousands of microscopic hollow plastic balls that expand when heated.

FORBES: Magazine Article

Informal to a fault, Google offices are littered with party-colored lava lamps, bins of free Coke and candy and giant plastic balls that invoke Google's multicolored logo.

FORBES: Companies & Strategies

Coach Lu Jung Yong(ph) scoops balls from a plastic wash basin and fires them at his pupils.

NPR: Pingpong: A Chinese Obsession