一种来自免疫系统的信使物质是‘开门器’，它能使肿瘤组织的血管有渗透性，以便让沙门菌通过并摧毁肿瘤。
A messenger substance from the immune system is the door opener: It makes blood vessels in the cancerous tissue permeable; enabling the bacteria to conquer and destroy the tumor.
即使是作为贺卡上的图像，或者挂在窗上的装饰，天使都履行着他们作为可见世界与不可见世界之间以及物质世界与精神世界之间的信使和媒介者这个古老的职责。
Even as images on cards, or as ornaments hanging in a window, angels perform their age-old function as messengers and mediators between the seen and unseen, or material and spiritual, worlds.
但是昨天我收到了一封信，这封信使我感到舒服了些，这封信所表达的感情要比它给我带来的物质援助更让我高兴。因此我今天可以给您写信了。
But yesterday I received a letter which did me good ?more for the sentiments behind it than for any material help it brought me.
但是昨天我收到了一封信，这封信使我感到舒服了些，这封信所表达的感情要比它给我带来的物质援助更让我高兴。因此我今天可以给您写信了。
But yesterday I received a letter which did me good ?more for the sentiments behind it than for any material help it brought me.
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