拼音：mù zhí zhòng shéng

解释：中：符合、合乎；绳：木匠用以取直，浸满墨汁的线绳。木材直得合乎拉直的墨线。

出处：战国·赵·荀况《劝学》：“木直中绳，輮以为轮，其曲中规。”

感情：木直中绳是中性词。

繁体：木直中繩

用法：A timber (lumber) is as straight as a straightened line made by a carpenter's ink marker.