1. A fine line employed as a graticule marker or an index in a precision device. 在''。'精密'。''装置中，作为一种十字线或分度标记而使用的细线条。
2. However, there is no useful serum marker that can predict early emergence of mutants during LAM therapy. 但是，目前尚无有效的血清标志物能早期预测拉咪呋叮治疗中变异的发生。
3. In the marker system while we only say YES one time followed by a reward, we can add encouraging verbal praise during the reward and after the reward. 在响片训练体系中，我们说一次“YES”接着就给狗儿一份奖励，我们可以在奖励的时候和奖励之后增加鼓励的口头赞扬。
英英解释
n.
1. some conspicuous object used to distinguish or mark something
2. a distinguishing symbol
3. a writing implement for making a mark
