木材直得合乎拉直的墨线。中，动词，符合、合乎。绳，木匠用以取直，浸满墨汁的线绳。
A timber (lumber) is as straight as a straightened line made by a carpenter's ink marker.
木(mù)
直(zhí)
中(zhōng zhòng)
绳(shéng)
