The oil passage is partly blocked.

油路部分堵塞了。

youdao

The oil passage is formed in a bottom portion of the differential chamber.

以及所述油道形成在所述差动室的底部。

youdao

Guarantee the engine air cylinder, spark plug and oil passage are cleaned.

保证发动机气缸，火花塞和油路清洁。

youdao

League of Conservation Voters president Gene Karpinski says opposition from the oil industry is another major roadblock to congressional passage of a comprehensive climate bill.

VOA: standard.2010.02.25

The main Southwest Passage into the New Orleans port remains open, though the three-day trajectory of the oil slick provided by NOAA suggests the waters around the passage could become tainted.

FORBES: The Gulf Spill: Now What?

Just such an event seems to have occurred in May, with the passage of a bill to halt deliveries of crude oil to the Strategic Petroleum Reserve.

FORBES: Strategic Oil Move

This seems to be a reaction to Iran's threats to retaliate against any attack by closing the Strait of Hormuz, the passage for roughly 40% of the world's traded oil, and striking at neighbouring countries.

ECONOMIST: Be very afraid, please