If the sender receives a positiveacknowledgement about a frame, it knows the frame has arrived safely.
如果发送端收到了有关帧的肯定应答，它就知道发送的帧已经安全到达。
2
We need an acknowledgement of our present ecological plight but also a language of positive change, visions of a better future.
我们需要承认我们目前的生态困境，但也需要一种积极改变的态度，拥有对更美好的未来的愿景。
3
Without public acknowledgement of those strengths doubt must remain as to whether or not the ADO.NET understand why LINQ to SQL has such positive support.
如果缺乏对这些优势的公共认识，怀疑则必然延续，这无关ado.net是否认识到LINQ To SQL为何具有这般正面的支持。