The IR Sensor Card 红外激光探测板
the ir spectra 红外光谱
the IR Spectrum Search 红外光谱检索
The IR Spectrum database 红外光谱数据库
the IR Database management 红外光谱数据库管理
ir studies in the west 西方国际关系研究
DET You use their to indicate that something belongs or relates to the group of people, animals, or things that you are talking about. 他们的; 她们的; 它们的
Janis and Kurt have announced their engagement.
贾尼斯和库尔特已宣布订婚。
DET You use their instead of "his or her" to indicate that something belongs or relates to a person without saying whether that person is a man or a woman. Some people think this use is incorrect. 用于代替“他的”或 “她的”,不指明是男是女
Each student determines their own pace in the yoga class.
每个学生决定他们自己在这个瑜珈班的学习速度。
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