Antarctica is accessible by sea for a few weeks in summer and expeditions usually aimed to arrive in January or February.

在夏季的某几个星期，人们可以乘船到达南极洲，而极地考察通常在1月或2月进行。

youdao

At 400 kilometers, orbital lifetimes are usually measured in a few months without re-boost. At 200 kilometers this drops to a few weeks.

在400公里高的轨道上，不推进的话，卫星的轨道寿命通常是几个月，200公里高度的轨道寿命是几周。

youdao

This can take a little bit of time but usually can take no longer than a few weeks.

这可能需要花费一点点的时间但通常不会超过几个星期。

youdao

Usually,it takes months and months and months, not just (a) few weeks.

VOA: standard.2009.05.06

Acute pericarditis usually lasts less than a few weeks.

CNN: Pericarditis

"For most people who have some type of treatment, the most intense pain usually is gone within a few weeks, " he said, adding that if the patient had no treatment and the wound healed on its own, there may be prolonged pain.

CNN: Scalp burns painful, need urgent care

Palestinian tax revenues have been held back in the past, though Israel has usually relaxed the restrictions after a few weeks.

BBC: Israeli settlement move risks diplomatic fallout