Mother was all for demanding to know the real plan but again, Graff cut off all discussion with a cheerful bellow of, "Let's wait to discuss this until we can do it without Shouting!"
母亲决心问清楚真正计划，不过格拉夫再次愉快地大声打断她，“等我们不用大喊大叫的时候再讨论好吗？”
2
Its main characteristic is that it adds a bellow structure, and it is named by the lapping sidewall — bellows one-off syringe, and it can flex freely.