der(R1 · R2) = der(R1) · R2, plus der(R2) if R1 is nullable
В США создали петицию для отправки младшего сына Трампа в Иран02:53，详情可参考新收录的资料
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The Artemis III mission, which had been expected to land astronauts near the moon's south pole in 2028, now will be redefined and rescheduled — launching in 2027 but not to the moon, Isaacman said. Instead, the yet-to-be-named astronauts will rendezvous and dock in orbit closer to home with one or both of the commercially built lunar landers now under development at Elon Musk's SpaceX and Jeff Bezos' Blue Origin.
Еще более 150 беспилотников сбили над Россией 8 марта19:56，推荐阅读新收录的资料获取更多信息
We were mainly just using Excel and Google Docs. We had a Google Drive and we had basically everything written down in there, then we had individual team lists. I had my own to-do lists and then the other people in some teams had their own to-do lists. But we didn’t have shared or whole production-wide project management tools because it was divided in different teams.