给我看看那个男孩的照片。
When saw those phot I could't help but remember the past good days before.
看到那些照片,我不禁想起美好的昔日时光。
Both rely on mathematical calculations to determine the location from which a positron or phot on was emitted.
这两种成像方法均依靠精确的计算来决定正电子或光于发射的位置。
Both rely on mathematical calculations to determine the location from which a positron or phot on was emitted.
这两种成像方法均依靠精确的计算来决定正电子或光于发射的位置。
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