candid
adj
not hiding one's thoughts; frank and honest 率直的; 坦白而诚实的
a candid opinion, statement, person 直言、 直说、 直性人
Let me be quite candid with you
your work is not good enough. 不瞒你说, 你的工作不怎麽好.
But here we come up against the most difficult of all obstacles to contact with people on other planets ----the astronomical distances which separate us.