had been faltering
-había estado titubeando
Past perfect progressiveconjugation offalter.There are other translations for this conjugation.

falter

The Secretary-General said that international trade had been faltering in the recent past, despite the trends towards to rapid growth in that trade which had manifested themselves over the long term.
El Secretario General dijo que en los últimos tiempos el comercio internacional se había tambaleado, a pesar de las tendencias a un rápido crecimiento que había registrado a largo plazo.
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