The boat calls at the main port to load its regular cargo of bananas.

船停靠这个主要港口以装载其常规货物——香蕉。

解答如下：

以上call属于下面第4种结构用法。在某地停靠

备注：单词的语义和词性决定单词在句中使用何种结构去表达特定意思。

(1)vt.叫;称呼;将…命名;给…起名字

结构搭配：call sb/sth+名词（作宾补）

I always wanted to call the dog Mufty for some reason.

不知怎么的,我老想把这条狗唤作穆夫提。

'Doctor...' — 'Will you please call me Sarah?'.

“大夫…”——“就叫我萨拉好了。”

(2)vt.把…说成;认为…是;将…称为

结构搭配：call sb/sth+名词/形容词（作宾补）

The speech was interrupted by members of the Conservative Party, who called him a traitor.演说被保守党人士打断,他们称他是叛徒。

I wouldn't call it a burden; I call it a responsibility.

我不觉得这是负担;我觉得它是一种责任。

She calls me lazy and selfish.

她说我又懒又自私。

He called it particularly cynical to begin releasing the hostages on Christmas Day...

他认为在圣诞节这天开始释放人质尤为讽刺。

Anyone can call themselves a psychotherapist.

谁都可以自称是心理治疗师。

(3)vi短暂停留;访问;拜访

结构搭配：call at+地点名词（拜访某地）

A market researcher called at the house where he was living.

一位市场调查人员造访了他的住处

(4)vi.(火车、公共汽车、船舶)停靠,停留

结构搭配：call at+地点名词（在某地停靠/停留）

The steamer calls at several ports along the way.

一路上,汽船在好几个港口停靠。