植物切口处形成了一个硬化的愈伤组织。
A ___callus developed at the cut site of the plant.
他那布满老茧的手掌诉说着一生的辛勤劳作。
His ___callused palms told the story of a lifetime of labor.
她每天长时间走路，脚底长出了硬茧。
She developed ___calluses on her feet from walking long distances every day.
浙公网安备33010902004675号
