youdao

A Russian official condemned the move and warned Turkey it was obliged to enforce the rules of an agreement that gives a 21 day limit on any warship from a country that does not border the Black Sea.

俄罗斯官员谴责了这一行动，并警告土耳其必须执行一项协议，对非黑海沿岸国家的军舰进入黑海实行21天的限期。

youdao

Poster Contest subjects are World of The Sea, Happy Moments, Zoo, Trip. Please pick up rules and details at PTA desk.

校内海报比主题是海底世界，快乐时光，动物园，郊游。请至家长会领取办法及规则。

youdao

South Korea has strengthened its rules of engagement in the Yellow Sea.

CNN: STORY HIGHLIGHTS

From the Old City to Tel Aviv is just 34 miles as the bird flies but a fast-forward in time: There, high-tech rules, and the walkway along the Mediterranean Sea is packed with young Israeli professionals and their families.

CNN: SHARE THIS

And if dead and decomposing bodies aren't your thing you can test your knowledge of the rules of taxonomic nomenclature by suggesting new names for five species of deep-sea worm, recently discovered around hydrothermal vents off Antarctica.

BBC: Forensic science uncovered