It was square bracket, start point, colon, end point, close bracket.
Media Session: Built-in support for the Media Session API via trackMetadata.
，这一点在同城约会中也有详细论述
then the += will modify the list, and then raise an exception because you can’t assign to that tuple item because the tuple is immutable, but the list will have been mutated.
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Apple will offer the F1 TV feed as the main broadcast alongside the Sky Sports feed for all races. If you’ll recall, ESPN used to show the Sky Sports feed with Sky’s commentary team for its coverage of F1. Apple says it’ll broadcast every grand prix in 4K (Dolby Vision) with 5.1 audio (no mention of Dolby Atmos).