Butterfly spring valves are important safety attachments of boiler pressure vessels, they are used to prevent system pressure from exceeding allowable limit value.

蝶形弹簧安全阀是锅炉压力容器的重要安全附件，用于防止系统压力超过允许的极限值。

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Look at the butterfly print by Alexander McQueen this spring. It's totally iconic.

看看今秋亚历山大·麦昆设计的蝴蝶印花，完全的图标式。

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Happiness is the prairie in spring, seeing a spring idea full of life, the butterfly dances.

幸福是在春天的原野，看春意盎然，蝶舞翩跹。

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It is intended to be eaten alongside other small plates, such as spring rolls with begonias and pansies, and a sweet, purple drink made from butterfly pea flowers.

WSJ: Flowers for the Eyes, and the Mouth