在集上买东西，买不了吃亏，买不了上当，但明显贵的东西，一准儿得长心。
Naturally, we’ll be getting in the Pro to test and will give our opinions on how effective all of this is when we’ve spent a month or two actually using it. But if you’d rather not wait and you’re based outside the US, you can pre-order the Ultrahuman Ring Pro right now, for $479, with shipments beginning in March. If you already have an Ultrahuman Ring, you can also get a trade-in deal to help cut the cost of the new model.
，详情可参考旺商聊官方下载
Global flags: --host, --api-key, -u/--username, -v/--verbose，这一点在一键获取谷歌浏览器下载中也有详细论述
async *transform(source) {