弱纬向环流
Weak zonal circulation
以上为机器翻译结果，长、整句建议使用 人工翻译 。
当少台风活动时期，东亚为纬向环流，西南太平洋上赤道西风及ITCZ也弱。
During the inactive period, the circulation of East Asia is essentially zonal and the ITCZ over Southwest Pacific is weak.
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