Stratospheric airship platform includes soft, rigid and semirigid airships.平流层飞艇平台可分为软式飞艇 、 硬式飞艇和半硬式飞艇.The frame of an airship is made of light but strong metal.飞船的框架是用轻而坚固的金属制成的.The airship circled at sea.飞艇在海面打圈子.If ne...
A burro is carrying salt of one large bag backcross a river.有一头驴子驮着一大袋子盐过河.The method can be conveniently applied to practical backcross breeding programs.该方法可以很方便地应用于实际的回交育种....
Teachers often encourage class participation.教师常鼓励学生积极参与We agree to joint participation with you in chinese art and craft.我们同意和你们合资经营中国工艺品....orienting students to new ways of thinking about their participation in classr...