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一斉に, いっせいに
1. simultaneously, all at once, in unison
同时,齐声
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叫ぶ, さけぶ
1. to shout, to cry, to scream, to shriek, to yell, to exclaim
2. to clamor (for or against), to clamour (for or against)
喊叫,呐喊;喧嚷(支持或抗议)