Baltic sea

基本解释

You can drive from the Baltic Sea to the Mediterranean without even showing your passport.
你可以驱车从波罗的海开到地中海，中途甚至不用出示护照。
Biologists have warned that burgeoning algae, encouraged by excess nutrients in the water, ranks as one of the most serious threats to the Baltic Sea.
生物学家们警告大家，水中过量的营养催生海藻发芽，这被列为波罗的海最严重的威胁之一。
As it happens, the biggest worry about energy in Poland is not carbon but the Nord Stream pipeline, which is due to pump Russian gas directly to Germany under the Baltic Sea, bypassing Poland.
假设果真如此，那么让波兰最为担心的能源问题不是煤炭而是北欧天然气管道项目，这一项目绕开波兰，将俄罗斯天然气经波罗的海直接送抵德国。

The study found that better controls are still needed in the North Sea, the Baltic Sea and the Bay of Biscay between France and Spain.

You can drive from the Baltic Sea to the Mediterranean without even showing your passport.
ECONOMIST: The world after 1989
Running along the bed of the Baltic Sea, it would circumvent troublesome transit countries in eastern Europe.
ECONOMIST: French arms sales to Russia