例句與造句

1. Despite being designed before a low radar cross-section ( RCS ) and other stealth factors were ever a consideration, a Royal Aircraft Establishment technical note of 1957 stated that of all the aircraft so far studied, the Vulcan appeared by far the simplest radar echoing object, due to its shape : only one or two components contributed significantly to the echo at any aspect, compared with three or more on most other types.
2. It's difficult to find echoing object in a sentence. 用echoing object造句挺難的