我打电话时常常信手乱画。I often doodle when I'm on the phone.各种不同的修补材料都是信手可得的.A variety of repair material is available.那献词浮在最上面,信手就可拈来 ( 笑声 ), 于是不知不觉地,我就把它偷来了.The dedication lay on top and handy ( laughter ), so by and by I un...
Propellant binders based on these materials have excellent mechanical properties and good performance.用这些材料制成的推进粘结剂的工作性能很好,而机械性能则更为突出.The and inferior binders fabrication process has become much more important.黏合剂制作工艺优劣显...