大家都搜：
1、jttu的英文全称：Jet Transitional Training Unit (US Navy) 中文意思：射流过渡训练单元(美国海军)
2、jttu的英文全称：Journey through the Universe (National Center for Earth and Space Science) 中文意思：穿越宇宙之旅(National Center for地球和空间科学)