aI am writing to express our heartfelt thanks for your taking good care of Smart while we were on holiday. 当我们是在度假时,我书写表达我们的衷心谢意您采取的好关心聪明。[translate] aFoundation under Grant No. 200021-108071 and 200020-120258 (A.D.). The authors also thank F. Amstad for ...