d := tree_depth(child);
From a speaker component perspective, it’s again quite similar to the Era 100. It has two tweeters positioned at a 90-degree angle for stereo separation paired with one midwoofer; it also has two additional passive radiators to increase the bass response in its relatively small case. The Era 100 lacks those passive radiators but is otherwise identical. Obviously, we’ll have to listen to the Play before saying how closely it compares to the Era 100, but this speaker should significantly outperform the Roam 2 simply due to the increased size of its components. The Move 2, on the other hand, is extremely loud and will likely still be the best choice for people who want a speaker to cover a large outdoor space.
，详情可参考有道翻译
在雄壮的国歌声中，大会胜利闭幕。
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