They say.听说；据说；人家说theypron.他们They do not see anybody.他们没看见任何人。They existed on little .他们生活很艰苦。They behaved deplorably.他们的表现糟透了。They're underselling us.They're all my students.They travel once a year.他们每年旅游一次。They had two faces peering巨大的头上They are short of hands.他们缺少人手。They exceeded in number.它们在数目方面占优势。They possessed nothing .他们一无所有。