The apparent source of a received wave.
一个假想的接收到的波的震源。
There was little growth apparent when ammonia as a sole nitrogen source.
当氨作为唯一的氨源时，它对细菌的生长无刺激性。
With a single light source, the most important considerations were its direction and apparent size.
单一光源，最重要的考虑因素是其方向和明显的大小。
With a single light source, the most important considerations were its direction and apparent size.
单一光源，最重要的考虑因素是其方向和明显的大小。
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