Such an area should be sealed off from the poultry pens or hatchery.这些地方同鸡舍或孵化室之间应完全隔绝.A hatchery facility includes racks a plurality of such trays loaded with eggs.孵化厂包括支承多个装有蛋的托盘的支架....
地球穿过某些彗星的轨迹线.The earth crosses the tracks of certain comets.箭的轨迹是一条曲线.The path of an arrow is a curve.回顾过去时能看到一条清晰的轨迹，还是只能看到一连串毫无目的、前后不连贯的工作经历？Can you look back and see a well-defined path, or simply an aimless series of...