And plants need to keep the root mass in some roughbalance with the leaf mass to be happy.
植物都需要保持住根群同时和茎群保持大致的平衡以便维系。
2
Thecurrent-account balance is a rough guide to which countries are mostvulnerable.
对那些经济极为脆弱的国家来说，国际收支平衡是一个粗略的指标。
3
The amount of loans treated this way is unclear because nobody centrally collates the data, and Fitch says its three trillion yuan estimate for off-balance-sheet credit is rough.