preach.er
n.（名词）One who preaches, especially one who publicly proclaims the gospel for an occupation.布道者：讲道者，尤指以公开传播福音为职业的人Alaska A fallen tree or log submerged in a river and creating a hazard for boats.【阿拉斯加】 沉木：砍倒后浸在河里并给船只造成危险的树或木头
<注释>River navigation in America has its own lexicon,including words for hazards encountered in riverboat travel.Large uprooted trees that had drifted down the river and become stuck in the riverbedwere sometimes known by their peculiar and dangerous characteristics.John McPhee writes for theNew Yorker : .One kind . . . known as asawyer, sawed up and down with the vagaries of the current . . .In the Yukon River, such logs—eternally bowing—are known aspreachers. In the Mississippi . . . they were allsnags. . 在美国内河航运业有它自己的专门词汇，包括用于表示船只在航行中所遇危险的词。一些被连根拔起的大树沿河漂流而下并且固着在河床上，它们都因奇特及危险的特性而为人所知。约翰·麦克菲曾在纽约人 中写道： .有一种…被称为 sawyer （漂流木）， 随着水流的变化擦来擦去…在育空河里，这种整日里打躬的木头被叫做沉木 。 在密西西比河中…它们都被称为水中沉树 .
