Aiming at the issues of heavy weight and insufficient structural performance of optical instrument supporting structures in extremely large telescopes, the Wide-Field Optical Spectrograph (WFOS) of ...
LONDON, Feb 3 (Reuters) - A lack of volatility and an unfavourable structure in the oil market cut the 2010 trading profits of Royal Dutch Shell , its chief financial officer said on Thursday as it ...
The parrot's brain has a nested 'core and shell' structure for vocal learning. Neurons in the shell surrounding the established vocal centers of the parrot brain play a part in vocal learning and ...
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