competent to advance and retreat -- at will be able to advance and retire
be able to advance and retire
能量用英文怎么说
能量不灭用英文怎么说
能量不足用英文怎么说
能量中心用英文怎么说
能量交换用英文怎么说
英语词典收录了最新的汉英词典和英汉词典，总共有200多万个词条，词库仍在不断更新中。
