The metal tool clanged when it hit the ground.
金属工具碰到地面时发出叮当声。
The metal tool clanged when it hit the ground.
金属工具碰撞到地面时，便发出铿锵声。
Artificially generated ground motion history is an important tool for earthquake engineering research.
人工地面运动时程是工程抗震研究的重要工具。
Artificially generated ground motion history is an important tool for earthquake engineering research.
人工地面运动时程是工程抗震研究的重要工具。
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