无形贸易收支 meaning in Chinese

invisible account

There are no official statistics covering the invisible account of the balance of payments ， but the size of the visible trade surplus during 1981 - 1983 and a pronounced increase in earnings from tourism suggest that the current account has been in surplus over the past few years
没有官方的统计资料涉及无形贸易收支，但在1981 1983年期间的有形贸易顺差的大小和旅游赢利的显著增长表明了经常项目在过去几年里有盈余。