1. downside n. 下降趨勢；底側

The downside is that customers must have a card reader attached to their computer.
缺點是消費者一定要被附上一個卡片讀者到他們的電腦。

The only downside was that you could not sleep in as the rooms are near a busy street.
唯一的不足就是，因為房間靠近繁忙熱鬧的街道，使你根本就不能入睡。

2.overlook vt. 忽略；俯瞰；遠眺；檢查；高聳于…之上

The important details were overlooked by them,
很重要的細節(jié)都被他們忽略掉了。

We can overlook the sea from the window of our room.
從我們房間的窗口，我們可以俯瞰大海。

3.a stack of 一堆，一疊
4.mechanical adj. 機械的；力學的；呆板的；無意識的；手工操作的

The most mechanical reaction to suffering is negative emotions.
對于痛苦最機械的反應是負面情緒。

It is these facts which make forecasting an art and not just a mechanical procedure.
正是這些實際情況使預測成為一種藝術而不是一個機械的過程。