He grins, delighted at the memory.想到往事,他开心地咧嘴笑了起来。The grins of his friends discomposed Jack when he tried to make his speech.杰克想要进行演讲时,他的朋友们咧着嘴笑,这使得他心里很慌乱。How can you teach a child who just grins stupidly at you all day?...
Used for testing horizontal combustibility of various textile and show with flame spread rate.用于测定各类纺织织物水平方向燃烧性能,并以火焰蔓延速率来表示.COMBUSTIBILITY: Does not burn. Retards the flame when coated on combustible materials such as S...