信纸
letter paper; writing paper
心志
will; resolution; aspiration
新知
new knowledge; new friend
心直口快
frank and outspoken (idiom); straight speaking; to say what one thinks
心直嘴快
frank and outspoken; straight speaking; to say what one thinks
伤心致死
to grieve to death; to die of a broken-heart
专心致志
with single-hearted devotion (idiom)
推心置腹
to give one's bare heart into sb else's keeping (idiom); sb has one's absolute confidence; to trust completely; to confide in sb with entire sincerity
纤芯直径
core diameter (of a fiber)
诛心之论
a devastating criticism; to expose hidden motives
违心之言
false assertion; speech against one's own convictions