projectionn.投影；投射；规划；发射；凸出物；预测；放映projection curves投影曲线projection period放映时间projection screenn.银幕；投影屏projection signal投影信号projection vector投影向量projection-type投射式projection matrix射影矩阵projection camera摄影机projection fibres投射纤维projection neuron投射神经元