（十一）承运人或者其代表的签名。
Guided Frame (Tensor G2 and newer): For blind or low-vision people, the camera app can now help take a selfie with audio cues (it works with the front and rear cameras). You'll need to enable TalkBack for this to work (Settings Accessibility TalkBack). Then open the camera app. It will automatically help you frame the shot.。新收录的资料是该领域的重要参考
int8 与 int4 — 有什么区别？，详情可参考新收录的资料
if (lines.length 0) yield lines;