Keeping the garden tidy all year round can be a laborious task.一年到头把花园拾掇得干净整洁也不是件轻松活儿。Her mother laborious sews the cotton fabric.她的母亲辛辛苦苦的缝制棉织品.They had the laborious task of cutting down the huge tree.他们接受了伐大树的艰苦工作.The...
宇航员在航天舱里工作生活.The astronauts work and live in the space capsule.航天舱在重返大气层时产生高热.The capsule gets very hot on re - entry.漂浮套管用于使降落于海面的航天舱浮于海面.Flotation collars are used to buoy space capsules that land in the sea....