Question

I've also brought a few slides of some large mineral samples

Answer 1

幻灯片的意思.

slide

[英][slaɪd][美][slaɪd]

vi.滑落; 下跌; 打滑; [棒球]滑垒;

vt.衰落（成）; 逐渐降低; 使悄悄转动; （使）快捷而悄声地移动;

n.幻灯片; 降低;

slides

[英][s'laɪdz][美][s'laɪdz]

n.幻灯片( slide的名词复数 ); 降低;

v.滑动,滑行( slide的第三人称单数 ); 滑落; 下跌; 打滑;