mushroom cloud
To act in a polite or proper way.
(transitive, idiomatic) To propose an idea or make a suggestion in order to learn the reaction of others to it.
Free from peril.
A large cloud of smoke, flame and debris that rises into the sky as a result of a large explosion, especially after a nuclear explosion, characterized by a long shaft rising from the ground into a much-larger or more-spread-out top, reminiscent of a mushroom in shape.
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DiQt(ディクト)
無料
★★★★★★★★★★