我在一棵快要枯死的榆树的树洞里安了家。I made my home there, in the hollow of a dying elm.一排雄伟壮观的榆树a line of stately elms枯死的榆树已被移去而换栽了一排幼树.The dead elms have been replaced by a row of saplings....
CONCLUSION : CPP is a new safe medical material with good compatibility.结论CPP材料是一种安全而理想的可吸收性生物医用材料.This machine is used for BOPP 、 PET 、 CPP 、 Al - foil, paper rolling material for composition.本机适用于BOPP、PET、CPP、铝箔 、 纸张卷筒...
中子和质子构成了原子核.The neutrons and protons form the core of the atom.原子核由中子 、 质子和其他粒子构成.The nucleus of an atom consists of neutrons, protons and other particles.中子就是原子核里不带电的粒子。A neutron is simply a neutral particle in the nucl...