名词
中文翻译：外部敲击
同义词：
['外部敲击，外部敲击声例句：1. The sound of the external tapping was heard from a distance.（从远处可以听到外部敲击的声音。）2. The engineer had to make adjustments to the external tapping system.（工程师不得不调整外部敲击系统。）']
例句：
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1. The sound of the external tapping was heard from a distance.
从远处可以听到外部敲击的声音。
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2. The engineer had to make adjustments to the external tapping system.
工程师不得不调整外部敲击系统。
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3. The external tapping was causing a disturbance in the room.
外部敲击声在房间里造成了干扰。