1on board 在船上
on board 是在一塊木板（船艙）之上，就是在船上。
109 學測｜閱讀測驗 第 2 篇｜第 4 段
A marine pilot goes on board at a crucial time and controls the vessel based on his or her knowledge of the port and the situation at hand.
引水人在關鍵時刻上船，根據對港口的了解與眼前的狀況來控制船隻。
- based on…：「根據…」
- the situation at hand：「眼前的狀況」
2board 登上
踏上木板走進船或車，就是登上。
111 學測｜混合題｜第 3 段
From Turkey, she boarded a small boat that held 20 people and set sail into the deep waters of the Aegean Sea.
她從土耳其登上一艘載 20 人的小船，駛入愛琴海深處。
- board：「登上」
- held 20 people：「容納 20 人」
- set sail into…：「起航駛入…」
- 背景：愛琴海（Aegean Sea）位於土耳其與希臘之間。
115 學測｜詞彙題
There were so many people at the bus station that I had to elbow my way through the crowd to board the bus in time.
公車站人多到我得用手肘擠過人群，才能及時上車。
- 考點：elbow 當動詞，elbow one's way through＝「用手肘擠出一條路穿過去」。elbow 是名詞「手肘」，名詞可以直接當動詞，意思就是「用它來做動作」。one's way 是「自己的路」。crash「撞毀」、tumble「跌倒」、struggle「掙扎」都沒有「擠過去」的意思
- so many… that…：「多到…」
- in time：「及時」（on time 是「準時」）